One ice cube tray or silicone tray
Liquid food coloring
2 Tablespoon hot water
1 cup soap flakes
For each color, put two tablespoons of hot water and one cup of soap flakes into a bowl.
Add as many drops of food color to the mixture as you wish. Stir the soap mixture until it thickens. This takes time, so be patient!
Press spoonfuls of the first color of soap into the sections of the ice tray. Push down to compact flakes as much as possible.
Mix enough soap in other colors to fill the ice tray, following the above directions again.
Let the soap crayons dry for one or two days. You can also freeze if you need to reuse the molds. Gently bang the ice tray to loosen the crayons.
Pack them in a box for gift-giving with fun bath toys or brightly colored wash cloths.