What can I make (and possibly sell) that doesn't require much space or equipment?

I have a small space to work. I move a lot so don’t have any tools or anything. But I crave a hobby where I can make something that requires an eye for aesthetic. Ideally, I would be able to list whatever I make for sale on a site like etsy or man a booth at a weekly open market or something, just for fun. I want to make a quality product – not just fun “arts and crafty” things – with a long shelf life and easy to transport. In the past, I’ve done a lot of baking and cooking, sewing, furniture restoration, car body work, etc. but none of these are very portable. Soapmaking looks like fun, but requires a lot of ingredients and so many people are doing it at the moment. If there were some kind of community workshop I would definitely make dresses or furniture. What are some other options? It definitely should involve making three dimensional useful objects (as opposed to 2D art prints or something, which I have no experience in). I don’t mind buying a few small tools, etc but don’t want to have to make a large investment, as I will be moving again soon!