Cheese Balls

Lilly made this soap ball at preschool. We were in the tub the other day, and I said, "How did you make this, anyway? I wanna make one at home." I was wondering what kind of dye they used to make it purple. I know they shredded up a bunch of Ivory soap and then the kids mashed it together to make these knobby kind of balls. (knobby balls heh heh). I asked Lilly, though. And she said, "I think it's cheese. You can't eat it though." me:"Oh, they shredded it up and it was like cheese?" "Is it cheese?" (thinks for awhile) "I think it's soap. And cheese. We squished it all together. But you can't eat it."