In a large bowl, mix the flour, salt and cream of tartar.
Add the vegetable oil and boiling water. Using a spatula, mix until combined. Once it's cool enough to handle, use your hands to knead the dough until it becomes smooth.
Divide the dough into balls (for how many colors you want). Then put the dough into the quart-size bags. Start with about 5 drops of color. Knead the dough while inside the bag so it doesn't stain your hands.
Now you're ready to PLAY! Squish it, roll it, stack it — what will you create? Print our play dough learning mats below for more ways to play!