Put the rice flour, corn starch, and salt in a saucepan.
Pour in the cream of tartar, water, and oil. Set the stovetop to low heat and stir everything together.
Keep stirring for 3–5 minutes, until the mixture thickens.
Take it off the heat. When it has cooled, knead until smooth.
Tint it with Kool-Aid powder or drops of food colouring.
Notes
If the dough gets sticky after a few weeks, knead in extra rice flour.Tag: Gluten-free.Safety: NOT a food. Adult does the stovetop step. High salt; keep from dogs.