Wood

The idea of stacking can be adapted to many materials such as foam board, cardboard and paper. 

All of these materials can be manipulated to form other shapes. 

These shapes can then be stacked. Below are examples of stacking with wood. 

Relief Sculpture

Above, artist James Florschutz. Link here to artist website.

Above, artist Ursula von Rydingsvard. Link here for website.