We've been playing with dough for over a week now. One day we decided to bake bread (which turned out badly, by the way) and finished way before the kids were ready to be finished. So I gave them some flour and water and let them experiment with how much makes a good dough.
That day, Isabela even made hers into a pizza dough...we actually put pizza sauce, cheese, and pepperoni on it, cooked it in the toaster oven, and ate it. Yes, even after her hands had squished all in it for like twenty minutes...and we're still here to tell about it.
Joaquin kept his in plastic and pulls it out every now and then...it just needs a little more flour when it gets sticky and it's good as new.
And it's cheap enough that we made a new batch when Isabela's friend came over.

Just flour and water.
How much? That's just part of the fun.