1. Interesting songs and cheerful music can develop babies' visual perception, to help them recognize colors and help young children develop hand-eye coordination. 2. Made of ABS, the toy is safe and durable. All parts are round and smooth without any sharp edge, which is safe for children. 3. The toy set comes with flashing LED lights, and it is easy to assemble. The cute little yellow ducks can climb stairs and slide tracks. The toy contains interesting tracks and cheerful music (with on/off button). 4. Special race track set design, exquisite pulleys, precise injection molding, micro-resistance design, so that the doll's center of gravity is balanced, and it runs more smoothly on the track. 5. Build track toys with your child, and enjoy the happy time of parent-child. Use hands and brains to cultivate children's perception of visual space and other aspects.