Find attached a fairly mad design for a seating device that is for a classroom.

I want to bring nature into the classroom by creating a chair that looks like a tree/hedge/forest. I really like this design.

I would love some help with designing the functionality of the chair. How could I overlap the branches in order to maximise strength. I was thinking of something along the lines of the weaving and gluing the boards.

Also, any material suggestions would also be appreciated.

THANKS!!