This playdough used by my son's preschool. It works really well....not too dry, too wet, too sticky, etc. A keeper! :)
1/2 C salt
1 C flour
1 TBSP cream of tartar
1 TBSP oil
1 C water
food coloring
Combine ingredients in a saucepan. Heat gently, stirring constantly. When the dough has a good consistency, take it off the heat and allow to cool. If you want to make different colors of dough, divide the dough and add a few drops of food coloring to each dough ball; knead until color is distributed.
*I added the food coloring to the water portion and made several batches of different colors.
**Also, if the dough is too sticky, keep it on the heat and keep stirring! You did not measure wrong, just keep stirring on the heat. I also took the pot off the heat and kneaded with my hands (after it cooled a touch). I made the mistake of adding more flour because I thought the measurements were off. After reading reviews online, I realized I had just had to keep it on the heat a bit longer!
Photo Source here