Keep Baby Occupied for Hours: When the tooddlers pull all the strings through to one side, they will turn it over and start again, hours passed but they may didn't realize it. Help Develop Motor Skills: Some strings are easy to pull, while the others are more challenging, helps strengthen fine and gross motor skills, hand eye coordination. Explore Different Textures: The textures on the string ends are varied, promotes the use of tactile response. More Ways to Play: Comes with popping bubbles and sliding ball function, the strings will produce sounds when pulled up and down, you can also shake it and watch the cords bounce around. Use with Confidence: The strings are made of high-quality silicone, which is elastic and durable. It has passed 16 CFR 1500.52 bite test, meets all CPSC requirements.