There are lots and lots of variations on the traditional Play-Doh recipe. Here are just a few.

Traditional

Ingredients:
1 cup flour
1 cup water
1/2 cup salt
1 T cream of tartar
1 T oil
food coloring

Directions: Heat all ingredients in a saucepan over medium heat, stirring constantly with a wooden spoon. When dough gets to the consistency you want, remove from heat and let cool. Make lots of batches in different colors. Store in a zip-lock bag or plastic container.

Variation: Substitute cake decorating food coloring pastes for richer, darker colors.
Another variation: Add some glitter.

Koolaid Play-Doh

Ingredients:
1 cup flour
1/2 cup water
1/2 cup salt
3 T of oil
1 package of Koolaid powder

Directions: Mix all ingredients together and cook over medium heat stirring constancy until reaching desired consistency. Remove from heat and cool. Keep in airtight container and store in the refrigerator.

Uncooked Play-Doh

Ingredients:
3 cups boiling water
3 cups flour
1 1/2 cups of salt
1 1/2 T oil
3 tsp. cream of tartar

Directions: Mix all ingredients except the flour in a large bowl. Mix well and then add the flour. Stir until dough scrapes off the sides of the bowl. Transfer to floured surface and knead to mix completely. Store in airtight container and refrigerate.