1 cup corn starch
1/2 cup water (extra may be needed)
food coloring if desired
Mix one cup corn starch with one part water, mix together well, add water in small amounts until desired consistency is reached. If you wish to add color, use a small amount of food coloring. The mix will feel solid when touched hard and will slide through your fingers when handled.
From Abby, age 6, Maple Grove, MN