1 c. salt (I use canning salt)
1 c. flour
1 tsp. powdered alum

Add enough water to make the dough stick together, but not enough to make it tacky. A little food coloring or tempra powder may be into the water before adding it to the dry mixture. Make several colors. Knead well. It can be used at once or it may be stored in a plastic bag and kept in refrigerator for several weeks.