"Clean Mud"

I found a recipe online for "clean mud," which is sort of like paper dough. It's made with toilet paper, ivory soap, and water. It's great, because it's a fun sensory activity for Ellie, but it doesn't make a big mess, it won't stain her clothing, and it can't be ground into the carpet. She calls it "Squish" and will ask for "Squish please?" when she wants to play with it. It keeps for a while in an air tight container, so she's been having fun with it.