The brand new mega wheel was designed to fit exclusively on your mega seat. the mega wheel spins around, as well as has a horn that when tapped will make a squeaky sound. a great add on accessory will keep your child entertained while in the mega seat. The wheel is lightweight, and easy to clean. the mega wheel only works on the mega seat and is the perfect accessory to compliment such a great seat! also, this great product is made in the usa!