I have two super easy no-cook recipes. This means the children can help make it.

Koolaid Playdough

Stir together 3 cups white flour, 1/2 cup salt & 2 packages of koolaid
Add 2 cups boiling water & 3 tablespoons oil
Mix well and knead until smooth

This one is also easy and very small:

1/4 cup salt & 1/4 cup cold water and 2/3 cup flour, then once it is all mixed stir in a food colour and mix & knead again.