39-PIECE SET FOR HOURS OF FUN This set comes with 39 pieces, so there's plenty of room for creativity. They can build their own tracks and watch the balls zoom around which makes it a great gift for kids aged from 1 2 3 years old and above that. STIMULATES IMAGINATION AND PROMOTES LEARNING This water slide tracks will stimulate imagination and promote learning plus, it's just plain fun! The Water Balls Tracks for Kids is a great way to keep little ones entertained while they're getting clean.