We made playdough. It was fun and easy to make. We used this recipe.
We keep the big balls of playdough in plastic bags. First we put it in the fridge but that made it too cold so now we just keep it on a shelf in the kitchen. So far it is lasting well, but it is cheap and easy to make so we can make some more when this stuff gets too old. I let them choose their own colours and let them mix their own up. It is very easy and because you use boiling water the dough is warm the first time you play with it. Nice in winter :)