The Rolling Ball Pile Tower Early Educational Toy is made of ABS material and features colorful colors to cultivate the baby`s cognition ability of color. It also helps to exercise children`s concentration. The toy is easy to play and smooth to play. Simply put the ball into the basketball hoop and it will slide down the track from the top to the next layer, and finally reach the bottom. The track toys come in random colors and are packaged in an opp bag. It is recommended for children over 3 years old to use it. To ensure the safety of the baby, please play under the supervision of an adult.