School assignment, 3 hours:

Design a piece of sitting furniture and make a 1:5 scale model, using cardboard.
No glue, string or other such external means of adhesive may be used - only the cardboard itself.

(examine assembly methods, draw also a sketch of the furniture in use)

Seems like my school has done this exercise many times.. and I'm the first to make a classical chair??

I have included the parts so you can see how it's done, or if you want to make your own ;)