Pack shredded soap around small toy. PACK TIGHT. Use entire pile of shredded soap.
Smooth outer edge of soap with hands. Let dry.
Video
Notes
Soap will harden as it dries. If you keep your soap by your sink for hand washing, they will last a long time. My kids mainly use them in the shower or for hand washing! If you let the kids use these in the bathtub, they might last for a few baths if they are soaked in the tub for any length of time. Note: Ivory soap is not tear free. A fresh bar of Ivory soap works best. Soap that is a year old is too brittle and won't grate as easily as fresh soap.