I've had a lot of fun with Sculpey, though it's not currently active. I've done paper mache and air-dry things on occasion. Ceramics when I was much younger. Bodycasting with plaster several times. If you're into paper mache, you'd probably love the plaster strips because they work very similarly. Just the plaster is a right pain to get off later. The cast pops off on its own, but any drips will weld themselves to skin and hair. :/

Oh, and food. I can do things like braid bread or shape cookies. I made sheep cookies for a holiday exchange once, by sticking little balls of dough together. So cute. If you haven't tried sculpting food yet, I highly recommend it. Fun, and you get treats!