1 cup flour
1 cup brightly colored juice (blueberry, cherry, pomengranate, grape, etc.)
1/4 cup salt
1/2 teaspoon vegetable oil
1/4 teaspoon cream of tartar
Put all ingredients in a pot and cook over medium heat, stirring constantly until the dough comes together. This only takes a few minutes. When cool enough to handle, squish and knead until smooth. Voila. Store in a container in the fridge.
A lovely yellow can be made by using the recipe above, replacing the juice with water, and adding a teaspoon of ground turmeric.
Update: I just made a chocolatey brown using, you guessed it, cocoa. Follow the turmeric version, but add 4 Tablespoons of cocoa in the turmeric's place. It smells good, looks just like cookie dough for your young pretend bakers, but is too salty to eat! A great addition to the above palette.
What's not to feel good about when you hand this over to those little lovelies?