By playing with these open-ended wooden planks, kids will learn first-hand experience with balance, leverage, geometry, and physics principles every time they design, stack, adjust and construct. Build an entire city or an enormous skyscraper, create castles with stairs and turrets, or make a ball run with slides, bounce plates, and more.

A set comes with 120 pieces of wooden building planks. 

Material: solid pine wood

Dimensions: 4.7 x 0.9 x 0.3 inches (each plank)