The best thing is that it probably costs under one dollar to make, so is cheap and is a good way to save money, rather than buying play dough from the shops.
1/2 cup salt
2 tbs cream of tartar
1 cup water
1 tbs oil
Mix all ingredients together in a saucepan and stir over heat until dough resembles play dough. Then just allow to cool and store in an airtight plastic bag or container.
Once LJ has had a play, I will add some photos of my endeavors.