Build a locomotive, a space ship, or an unlimited number of possibilities with our new, easy-to-use Snap-BlocTM building system. Snap-BlocsTM are designed to be easily handled, and their rounded sides allow kids to use curves and angles in their projects. Made of durable plastic. Set consists of 16 standard 7-1/2" x 3-3/4" x 2-7/8" blocks (four each of yellow, red, blue, and green); two 3-3/4" dia. half roof blocks (red and blue); and two 3-3/4" cylinder blocks (red and blue). An Infection Control® product, clean with bleach and water solution. Ages 3-6.