12 Pcs Stained Large Rainbow Wooden Creative Puzzle Square Blocks With Storage TrayThe set contains 12 pieces and comes in a sturdy wooden frame. Create two dimensional graphic patterns and three dimensional forms. Playing and building with the rainbow color square develops fine motor and spatial reasoning skills. Material: basswood, stained with non toxic water based dyes. Dimensions: 10. 7 x 10. 7 x 1. 8 inches.