I was really intrigued by this model, because of its 3-d finish. Apart from having seen faces and such formed from tessellations, I had really associated tessellations with being essentially flat. Another surprise was that you first have to fold spread hexagons, and that model then very easily transforms into the star puff.
Paper: 19.5cm square of transparent paper
Model: 4.1cm x 12.2cm x 0.8cm