Made of eco friendly ABS material. With some holes and colorful small balls inside, and a sponge in the center, it allows the colorful balls to slide from one slot to the next when you press on them. The magic ball is a puzzle game that careful observation and thinking, which can exercise the brain and improve the problem solving ability.It's a ideal pastime toy for childrens, teens, and adults, whether at home or at the workplace.Welcome to your inquiry!