Hobbies for a shed

I have just purchased a new home, with 3 small sheds in the back garden. One has been used as a utility room/storage shed, one as a playhouse, and the other was a birdhouse.

I have already decided that I am going to remove the playhouse, and keep the utility/storage shed to do just that. However, I would like to deep clean the old birdhouse and use it for something different.

So I suppose I would like to ask what hobbies you do in a shed? I had a couple of ideas already one of which was for home brewing, another was for a home gym, another was a train set/Scaletrix. Any other suggestions? I am looking to think as broadly as possible, no boundaries!

Hobbies for a shed