Foam Block Turns Into A Chair When You Sit On It – Neatorama
http://www.neatorama.com/2009/10/26/foam-block-turns-into-a-chair-when-you-sit-on-it
"Yu-Ying Wu, a graduate student in industrial design at a Taiwanese university, created a foam block that turns into a chair when compressed. The holes in the block aren’t random — they’re carefully shaped and selected to fold into a specific pattern when the user sits on the chair"