Even preschoolers can shape these soap snowballs. Part of the fun is hiding a small plastic toy in each ball as a prize for good bathers. I chose penguins because they look so at home in the snow.
Use a food processor fitted with the grater attachment to shred the four bars of soap. (You can also grate the bars by hand with a cheese grater.) Pour the soap pieces into a large bowl.
With your hands, mix in about a half cup of lukewarm water, a little bit at a time, until the mixture is squishy and claylike.
For each snowball, scoop up a heaping handful of soap and mold it into a ball. Poke a deep hole in the center with your finger, insert a toy, and refill the hole. Lay the finished snowballs on a cookie sheet and let them dry thoroughly. Makes 8.