If you don’t plan to use Crazy Dough immediately, put it in a plastic bag, squeeze the air out and close the bag. You can put it all together in another bag, just to be safe, because the dough will continue expanding and the first bag could burst.
Keep the dough in your fridge for up to 3 days. You can freeze it, too, for up to 3 months. Defrost and use in the same way as you would use fresh dough.