An experiment on using 2d material to create 3D object without using any glue or tape to hold the pieces together. This chair was made of 35 pieces of paper and can actually be seated ! it would hold up to 130 lb...( or more if carefully seated .. )

I've also developed this idea into an actual wooden interlock chair. 
Paper to 3D
Published:

Paper to 3D

Chair made of paper plans, from 2d to 3D

Published: