Not only is homemade play dough much cheaper than the store bought stuff, you also know exactly what has gone into it, so it's safe for your little ones (especially if they can't resist tasting it!). It is also, in my opinion, better! and nicer to play with!
1 cup plain flour
1/2 cup salt
1 tbsp vegetable oil
2 tbsp cream of tartar
1 cup water
Assorted food colouring
Enjoy!