I thought of this the other day and just mentioned it in another post, but I would love a pottery activity like ceramics! I love being able to craft and sell/display items with the woodworking bench, easel, flower arrangement table, etc. Having a ceramics station where you can throw clay and sculpt bowls, plates, mugs, vases, wall decor, and so on would be awesome! Just to simplify the process for the sake of the game, I think you would pop it in the kiln and then maybe just select a color scheme for the item when it's finished.
When building the skill early on, I'd imagine that bowls come out wavy, plates break in the firing process, and other similar errors. And of course once you have the skill, you could produce beautifully crafted masterpieces.
I'm kind of making it up as I go along typing this out, but I think it could be a new fun skill and even self-employment career option.
