I bought mine at baby r us and it was only $20 bucks.... And it gives u a whole kit ;)
I it like a clay one or paper machay
You can buy paper maiche In the craft section at wak Mart and make your own. Just make sure you use A LOT an I do mean A LOT of Vasaline or massage oil on your stomach first or it will all stick to your skin and make a mess. Some people even wear t shirts.
You could try looking on pinterest! They have almost everything on there lol