First you put in 1 cup of flour, 1/2 cup of salt, 1 cup of water, 2 Tablespoons of cream of tartar, and 1 Tablespoon of oil in a pot. Cook this over medium heat until it forms a ball.
When it cools a little bit, add your food coloring and mix well. Squeeze that ball of dough until the color is mixed in well. This is a great activity for children who need to work on their fine motor skills!
The only down side to making homemade playdough is your hands will be a different color, but it isn't a permanent change.