Blocks have be proven to help children learn spatial reasoning and help foster a healthy imagination. This 102 piece set is the perfect gift your little builder. Blocks stimulate the natural learning process: through play the children discover shapes and quantities, spacial dimensions and physical laws and much much more. Not only do they provide hours of creative fun and entertainment, HABA Building Blocks can be used purposely to foster children's mathematical perception. Shapes are in standard measurement (1.75" x 1.75"). All HABA building blocks and systems are compatible with each other. Made in Germany of reforested, solid natural, untreated beech wood.