If you have a morning open, an out of the way small project - chopstick making workshop was fun
We were visiting someone and had a day to kill and we came across this 1.5 hour chopstick workshop in Taipei in the Dihua district. It was a woodworking shop and they had you pick a wood type, do some planing and sanding, then varnish or oil or whatever it's called, then you also can woodburn some characters or pictures into the end. They came out so nice like real professional looking, and it was pretty fun. It's a nice way to make a useful souvenir and see how it's made.
If I'm allowed I can add the link but something similar shouldn't be hard to find if you google it, I think ours was jiwoodwork, maybe ~$25 US a person. We also did the papermaking craft at the paper museum, both were a fun experience if you're just hanging around the city and want some low key events.