What are the name of those things that look like Go-Gos Crazy Bones that grow when you put them in water?

I saw them on a commercial, but I didn't remember the name when I realized I wanted some.What are the name of those things that look like Go-Gos Crazy Bones that grow when you put them in water?
I think they are sold under a number of different names, but one name is Magic Grow.