The Building Blocks are large foam blocks designed for use by children with fine motor disabilities. Made of dense foam-filled, brightly-colored, non-toxic material, the blocks are lightweight and easy to hold. The printed blocks are available in castle, supermarket, and gas station sets and each set includes a zippered vinyl storage bag. The blocks are machine washable and dryer safe. DIMENSIONS (LxWxH): A full base block is 8 x 4 x 4 inches.