Submitted by Sara on 10 November 2008 - 8:39am
1 : sqrt(2) (A-sized)
Check http://erikdemaine.o... for instructions on how to get an A-sized paper from letter paper, and http://erikdemaine.o... for square to A-sized paper.
By A-sized I mean paper that has the proportions 1:sqrt(2) (see Wikipedia for more). I call it A-sized, rather than silver rectangle, because silver rectangle also refers to a rectangle with an aspect ratio of 1+sqrt(2) (see Wikipedia for more).
Submitted by Child of Ra (not verified) on 12 November 2008 - 11:00pm Permalink
The video was very helpful, and I enjoyed some of the "short-cuts" you took! It made the diagram much clearer!
...Thanksgiving is coming up , here in the U.S., and my geometry teacher wants me to teach something to the class, any ideas?
Submitted by Sara on 13 November 2008 - 11:03am Permalink
Hm, I'd go for either the rotating tetrahedra by Tomoko Fuse (3 sheets, quite simple - unfortunately I haven't contacted Fuse-san on permission yet), or Kazuo Haga's Tetrahedron: http://www.happyfold...
The first model should probably take a bit less time, but I think both are suitable for beginners. I think the second one might be more interesting in terms of "Geometry Class", but the first one slightly more fun (because it's an action model).
Submitted by Child of Ra (not verified) on 14 November 2008 - 1:55am Permalink
Thnkx for the tip,
but I need help on steps 7-9...
Submitted by Sara on 14 November 2008 - 8:54am Permalink
Steps 7-9 of which model?
Submitted by Child of Ra (not verified) on 15 November 2008 - 3:19am Permalink
the rotating tetrahedra by Tomoko Fuse (any help will be greatly accepted).
Submitted by Child of Ra (not verified) on 29 November 2008 - 11:07am Permalink
...My teacher and I, decided that I should just give intructions on the paper cup (flat-fold) and the water bomb...everything went pretty well!
She gave me some extra large origami paper, so I have been thinking on making videos!
I will only make a video on an old kawasakii version I found...also on any videos on youtube that are poor in quality/intructions, so watch out! ;)
Any videos you can tell me about?
Submitted by Sara on 29 November 2008 - 11:48am Permalink
I can tell you...
Well, I CAN tell you that Kawasaki-san doesn't want these videos on how to fold his designs to be on the web. That's why there's none available from me. He has done amazing stuff, so it's unfortunate that he feels about it this way, but I respect his wish. It'd be great if others would, too. Maybe you can have a think about it?
Other than that, do try making videos. But why not make the effort to ask permission if it's not a traditional design? I think that'd just be fair.
Submitted by Child of Ra (not verified) on 29 November 2008 - 10:56pm Permalink
Yep, we can't over look credits and permision!
I do think that most of the videos on youtube don't have permision or even credits, so I will see if I can "over-write" them with permitted copies.
I will try my best a contacting the creators, but Sara, what should I do if a diagram has been posted online and I can't contact the creator of the dia. or the artist or the webmaster?
PS. Did you check your e-mail?
Submitted by Anna Richard (not verified) on 8 March 2009 - 1:55am Permalink
Me too I need help.
Me too I need help.
Submitted by sarah (not verified) on 16 November 2008 - 3:28am Permalink
i kinda get confused with your stuff but your kool and do you mind helping me with this
mostly your origami fireworks please reply
Submitted by sean (not verified) on 22 December 2008 - 10:35pm Permalink
nice that is the coolest
nice that is the coolest origami
Submitted by Daniel (not verified) on 30 December 2008 - 6:24am Permalink
I searched up for any other models that have the same shape as the star form of the flexicube. Fortunately I was successful. I remember the star form is called a stellated rhombic dodecahedron.
Submitted by Sharon (not verified) on 12 January 2009 - 2:25am Permalink
Thanks for posting this you
Thanks for posting this you tube vid! My son loves origami and he will blow his mind when he sees this! I like that you used 2 different colors so you can see how it is made without getting to confused. This is like your own hand made rubicks cube! Sharon
Submitted by mousa (not verified) on 19 January 2009 - 3:41pm Permalink
thank you very very very much for all of your videos and thanks to i have been able to do the dinosaur and the simple butterfly and the brooch rose and almost the scorpion and i am trying the star flexicubes and i hope you do a video about the butterfly that covering your website just saying thank you all the way from Amman.Jordan
Submitted by Johnny (not verified) on 12 February 2009 - 3:54pm Permalink
My wife loves origami. that
My wife loves origami.
that is the good origami
Thanks for posting this you tube video
Submitted by Anonymous (not verified) on 16 March 2009 - 12:06am Permalink
Funny thing about this model
If it wern't for this model, I would have never found this website. I google searched "Double star flexi-cube", and found this website so amazing, it is always on my list of things to check on the internet every day.
Submitted by Andrew (not verified) on 7 April 2009 - 2:34am Permalink
I'm 9 and I like origami. I tried this one but it's a little to hard but thanks Sara!
Submitted by Andrew (not verified) on 7 April 2009 - 2:36am Permalink
Just thank you again your origami is really good.
Submitted by niv15 (not verified) on 27 May 2009 - 1:00pm Permalink
I dont understand
please tell me what you mean by proportion of 1:sqrt(2). Because I am just 10 I dont know anything about advanced maths.I hope your reply would help me.
Submitted by Sara on 27 May 2009 - 2:52pm Permalink
The square root of 2 is 1.41421356. This means that if you have a paper of width 10cm, then it has to be about 14.15cm long. Or, in inches, if you start with a paper of width 4in, then it has to be about 5.65in long. Also see http://en.wikipedia.... for more information on A-sized paper.
Hope this helps,
Submitted by mohammed (not verified) on 12 July 2009 - 9:11pm Permalink
OK dude Im 9 and I know what
OK dude Im 9 and I know what sqar 2=.its 1 less than the silver ratio. I always read the encyclopedia
Submitted by Alec (not verified) on 18 June 2009 - 7:18pm Permalink
Hummm... not sure I could ever pull that off but I suppose one has to start somewhere. I will poke around your website and i am sure I can find something more appropriate for a beginner like myself. Thanks for the inspiration!
Submitted by Anonymous (not verified) on 22 June 2009 - 10:35pm Permalink
i am confused of the paper
i am confused of the paper
Submitted by slater (not verified) on 24 June 2009 - 3:53am Permalink
i folded it... yes! thanks so much for the video and for all your videos that you make.
the one i made is sort of weird looking so ill just make another for the first one i used tape is that cheating? please reply
Submitted by Sara on 24 June 2009 - 6:36am Permalink
Well, in my opinion you should have fun with origami. Sometime this includes cheating. I have used tape in the past on modular origami, mostly because I gave it to kids and they tend to be - a bit more lively when handling models.
When you use tape to connect the models it's not pure origami anymore, but is that so bad? There's no reason to be militant about what's allowed or not.
Submitted by slater (not verified) on 24 June 2009 - 11:12pm Permalink
Thank you for answering my post Sara . The model is definitely fun (I think all origami is fun!) and I'm going to make another one ( a pure version ) I think the diagrams are hard to understand about the assembling part. how did you figure them out?
Submitted by slater (not verified) on 26 June 2009 - 12:54am Permalink
Hi Sara where can i get the paper that you used in this video i have a hard time finding good paper for my origami
Submitted by Sara on 26 June 2009 - 6:57am Permalink
In this model
I used the following paper in this model:
* card for the units
* normal copy paper for the hinges.
Submitted by WumboFreak (not verified) on 14 July 2009 - 1:22pm Permalink
paper and you!
One Question: Can I use half of a square for the paper because I really don't like designs that involve so many complicated measurements that i later don't have available and i don't?
May you also check my channel at youtube.com/WumboFreak and look at my stuff? I need to know if my videos on origami are clear enough! The vids are only if you're an experienced origamist so yeah...
One more thing... Watch the main video and please vote on the next design i should do! thanks for your support and please reply!
Submitted by Sara on 14 July 2009 - 5:56pm Permalink
You will have to start with paper that has a ratio of 1 by square root of 2. Using 1 by 2 will *not* work.
Submitted by Sara on 14 July 2009 - 6:22pm Permalink
I watched the video on your 3D Omega star.
Here's my feedback:
Overall, the video seems relatively clear, but I think you could improve greatly by trying the following:
Submitted by sma (not verified) on 29 July 2009 - 11:50pm Permalink
Does it matter what kind of
Does it matter what kind of paper you use or is thicker any better when folding and doing this?
Submitted by Sara on 30 July 2009 - 6:23am Permalink
It always matters what kind of paper you use. Some will work better, some will look prettier etc.
For this model I prefer to take heavier paper for the units, and lighter paper for the hinges. I think in this video I used card for the units, and normal copy paper for the hinges.
Hope this helps,
Submitted by jes (not verified) on 31 July 2009 - 9:50pm Permalink
Can you do an instructional video on the heart bookmark??????????????????
Submitted by Eddie (not verified) on 6 September 2009 - 8:42pm Permalink
Wow this was amazing going to
Wow this was amazing going to give it a try here in a little bit very impressive. Eddie
Submitted by niv16 (not verified) on 5 October 2009 - 5:35pm Permalink
What and where?
What do you mean by card paper. Is it cereal box card ( the thickness of a cereal box )or any Cardboard ( that brown coloured stiff paper )
Submitted by Sara on 5 October 2009 - 6:38pm Permalink
By card I mean paper with maybe a weight of 150-200gsm or so.
Submitted by alberticus (not verified) on 20 October 2009 - 11:25am Permalink
I made it! But the pieces tend to fall apart.Can you help in any way?
Submitted by Sara on 24 October 2009 - 6:12am Permalink
Accuracy is key
You need to fold quite accurately for the modules to fit together perfectly. Also, there's some pushing and pulling involved to make them move together in all the right places. I only folded this model twice, and it turned out quite stable. But when you're off by just a bit the units (3 modules) don't quite close up, leaving a small hole in the middle.
Submitted by Michael Cheung (not verified) on 6 November 2009 - 7:11am Permalink
What kind of paper do you
What kind of paper do you recommend us to use?
Submitted by Sara on 6 November 2009 - 7:19am Permalink
I suggest you use slightly heavier paper for the units, and lighter paper for the hinges. In the video I used normal copy paper for the hinges, and card for the units.
Submitted by I0met0him (not verified) on 8 November 2009 - 5:53am Permalink
Help Sara, please help
Hi, I was just wondering, since this is a video on the 'double' star flexicube, shouldn't two double star flexicubes make a full double star flexicube? What I mean by a "full" double star flexicube is, well, a thing that has the two able to fit together, and turn as one. I made two, and either I made one of them wrong, or you need to assemble on of them differently. Please, I was really looking forward to making was it was named for. If there is anything you can tell to help me, it would be greatly appreciated, and, even if there isn't, thank you very much for trying.
Submitted by Sara on 8 November 2009 - 7:41am Permalink
Combining two constructions
Check the diagrams available at http://brilliantorig... - page 3 shows the placement of hinges. If you form a star of one of the constructions and a cube of the other one, the star should fit into the cube.
Submitted by sihou (not verified) on 2 January 2010 - 10:40pm Permalink
this is a yoshimoto cube
this is a yoshimoto cube created by yoshimoto in 1971
Submitted by Anonymous (not verified) on 27 January 2010 - 2:42am Permalink
where do you generly buy A-sized paper
I’m just a bit curious where you can buy A-sized paper from.
Submitted by Sara on 27 January 2010 - 4:15pm Permalink
Almost anywhere in the world
A4 is the standard printing paper size in most countries. I think the only exceptions are the US and Canada. So I'm guessing you live somewhere round there. :)
I have been told that office supplies stores and some stationaries in the US will carry A4-sized paper. I'm not sure how big the selection will be (e.g. colours), but I guess you have to take what you can get. Or you can just choose your preferred paper and cut it to A-sized. There are instructions for this here:
How to get A-sized paper from letter: http://erikdemaine.o...
How to get A-sized paper from a square: http://erikdemaine.o...
Hope this helps,
Submitted by Anonymous (not verified) on 28 January 2010 - 2:11am Permalink
Yeah it seems I may have to go look around a bit more in the some of the stores in the Us. Other wise I'll just keep making A-sized paper like I normally do.
Submitted by Anonymous (not verified) on 22 May 2010 - 7:53pm Permalink
nowere un less you go some
nowere un less you go some were in california in los angles for like 10$
Submitted by Anonymous (not verified) on 22 April 2010 - 12:53pm Permalink
Sara do know why there isn't
Sara do know why there isn't a4 paper in the US and Canada just curious not that i live there
Submitted by Anonymous (not verified) on 26 May 2010 - 9:26pm Permalink
hi sara i didnt understand the last fold do u think u can describe it a bit more? its very good described but u should show underneath...
Submitted by Auora (not verified) on 1 June 2010 - 2:26pm Permalink
Hi Sara I just thought i would tell you that there is a much easier way to fold the last step on the modules. It's very hard to explain but I can maybe mail a video with it. I had problems with that last step myself so i experimented and I found out my own step! :) the video might be coming soon.
Submitted by Sara on 1 June 2010 - 6:11pm Permalink
Cool. Maybe you can post it as a video response to my instructions. Then viewers will be able to profit from your findings more easily!
Submitted by mister (not verified) on 15 June 2010 - 2:21pm Permalink
When I made it. It did not come out to good.can you use copy paper? It just not coming out the way I want it to, The part I having trouble with is the put together part. it only keep losing............
Submitted by Sara on 15 June 2010 - 3:10pm Permalink
I prefer stiffer paper than copy paper for the units of this model. Copy paper should be just right for the hinges.
By "put together part" do you mean adding the hinges? Be sure to get the locking mechanism right, then it should be ok (although not super stable).
Submitted by Anonymous (not verified) on 18 June 2010 - 6:17am Permalink
how do you make a size paper
how do you make a size paper
Submitted by Sara on 18 June 2010 - 12:16pm Permalink
I posted links right below the video. Check those.
Submitted by Rancon (not verified) on 15 July 2010 - 4:58pm Permalink
can i use glue? i cant hold it together
Submitted by Sara on 15 July 2010 - 8:07pm Permalink
Sure, if you want you can use glue. That's your personal decision. If you want to glue the units together there are two options:
1. Glue the hinges using "wet" glue.
2. Glue the units themselves together using tape.
You can also, if you think it's necessary glue the modules together to get a unit. Personally, I've folded this model three times or so, always being able to complete it without use of glue. So it is possible. However, it may be easier to use glue. :)
Submitted by Anonymous (not verified) on 11 August 2010 - 7:54pm Permalink
Hi Sara, I just got the instructions and i was ready to go, but then i realized that i didn't know what paper size to use. If you hadn't guessed already, i'm wondering what size paper to use? If you could cm or inches would be best. Thanks! :)
Submitted by Anonymous (not verified) on 11 August 2010 - 8:03pm Permalink
Sorry!! I just looked under
Sorry!! I just looked under the video and saw links for it! Never mind, I think i'll be okay now.
Submitted by Anonymous (not verified) on 18 August 2010 - 4:44pm Permalink
I've done this model a few
I've done this model a few times and always had to complete it with a glue. :D
Submitted by Anonymous (not verified) on 16 November 2010 - 5:53am Permalink
If the difficulty level of this project is considered 'low intermediate', I'd hate to think what the 'high expert' level is like!
Submitted by Sara on 16 November 2010 - 5:06pm Permalink
What "complex" is like
Two examples are Satoshi Kamiya's "Ancient Dragon" and Hung Cuong Nguyen's "Eagle". :)
Both models require several hours of folding, provided you have very advanced origami skills and the right paper for the model. If not, well, let's not talk about that. ;)
Submitted by Anonymous (not verified) on 28 December 2010 - 2:58am Permalink
how do you make the other
how do you make the other star that fits inside that one? is it the same order or is it different?
Submitted by Sara on 2 January 2011 - 1:46pm Permalink
In the diagrams Dave says to do two identical constructions. I faintly remember doing two slightly different constructions, but it's been too long. I suggest you make two, and if they don't quite fit together, you can remove the hinges . To ease the process you can at first check with masking tape whether the position of the hinges is correct.
Submitted by Anonymous (not verified) on 3 February 2011 - 3:51am Permalink
I thought the paper size would be to big (the smaller, the cuter) so I thought would size DOWN the paper by a 4th. Is that okay? PPPPlease reply!
Submitted by Sara on 3 February 2011 - 1:58pm Permalink
Yes, that's ok
Yes, you can use a quarter of the paper if that had the right ratio. The fun fact about A-sized paper is that if you cut it in half, it will have the same proportions again. :)
And if you cut it in half again (thus getting a quarter), that's still true, of course!
Submitted by Anonymous (not verified) on 5 February 2011 - 2:49am Permalink
Submitted by Anonymous (not verified) on 3 February 2011 - 3:54am Permalink
i cant really know how to convert "mm" to "cm" or "inches" yeah so I need help with that
Submitted by Sara on 3 February 2011 - 1:57pm Permalink
Online tools exist
There are many online conversion tools for you if you are having troubles with that. Even Google can do those conversion for you. For example, search for 5cm in inches.
Submitted by Anonymous (not verified) on 25 August 2013 - 11:52am Permalink
mm to cm
10 mm equals 1 cm, 0.1cm equals 1mm...
dude I am in primary school -_-
Submitted by Anonymous (not verified) on 5 February 2011 - 3:00am Permalink
is the flexicube basically the same way as this?
Submitted by Sara on 5 February 2011 - 9:41pm Permalink
Which model are you comparing this to?
This is a flexicube, no? I'm not sure which model you are comparing it, sorry.
Submitted by Anonymous (not verified) on 14 February 2011 - 2:58am Permalink
The model with only cubes moving, not a star in the middle.
Submitted by Anonymous (not verified) on 29 March 2011 - 2:14am Permalink
What size of paper?
What size of paper?
Submitted by Tim (not verified) on 8 May 2011 - 4:07am Permalink
Thanks a lot for the video
Thanks a lot for the video ^_^ your accent is the best.
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