I loved making this with my two sons when they were little and will be making it with grandbabies soon.
1 cup colored water (Use as much food coloring in the water to achieve desired color of play dough, realizing it will lighten when mixed with the flour)
1 cup flour
1/2 cup salt
2 tsp cream of tartar
1 Tbsp vegetable oil
1 tsp vanilla or lemon extract for scent (I use vanilla)
Mix colored water and then add all ingredients and mix well in heavy saucepan. Cook over medium heat 2 - 3 minutes, stirring continually with a wooden spoon. This will form a rubbery ball. Be careful not to overcook.
Store in air-tight container.
It also makes a great gift for little ones to make and give to friends, teaching them the joy of giving.