1 c. cornstarch
2 c. baking soda (1 lb.)
1 1/4 c. cold water

Stir in saucepan over medium heat for 4 minutes until mixture is mashed potato consistency. Remove from heat. Turn onto a plate and cover with a damp cloth until cool. Knead. Shape as desired or store in airtight container.

For color add a few drops of food coloring to water. Objects may be left to dry before painting.