3 years & up. Square, double-sided, puzzle-like base pieces interlock in a variety of ways to create a 2D or 3D base that supports IO Blocks® and gears. Encourages fine motor skills, problem solving, dramatic play and spatial conception. Children can build both horizontally and vertically use the base pieces. Little people with unique accessories and cows add an element of fun and imaginative play. Includes activity cards. 118 pieces.