This basic building set includes 112 pieces in assorted sizes and vibrant colors for hours of imaginative play. Eight (8) functional wheels add motion to objects providing additional options to young builders. Manufacturered by Bristle Blocks by Battat. The blocks in this set are compatible with Battat Spinaroo and Stackadoo bristle block sets. Recommended for children 2 years and up. Bristle blocks feature soft interlocking bristles that stick together at any angle for frustration-free building.