Colorful Balls Run Slide Block Dropping Disassembly and Assembly Game Toy details: There are 50 building and 30 balls. Set of blocks for kids can improve their hands-on ability,, exploring capability, hand to eye coordination, color discrimination, and increase their. Colorful and beautiful appearance can stimulate the brain and thought of kids. Assembling these blocks with your children can make wonderful memory together. Plastic building are of, and easy to build. Create your own maze model by using your, and watch the balls race through the track. Please use it under the supervision of an adult, because there is a small inside. Feature: Material:plastic Assembled Size:30x18cm / 11.8x7.1in. Note: Please use it under the supervision of an adult!!! children from swallowing small balls by mistake!!!