This innovative creative building set includes 42 notched wooden units that can be interlocked and stacked to form vertical or horizontal squares, walls, floors, fences, towers...anything you can imagine. Amazingly, every block is a different color - varying in hue, value and intensity - allowing children to discover how color works as they experience them and use them in different ways. Every block also has unpainted natural wood grain on one side, adding to the building design possibilities.

Blocks measure 3.75 x 1.75 x 0.5 inches each, and fit neatly into a 11 x 7.5 x 2 in wooden frame for storage. Recommended for ages 3 to adult.