summer project?

I have this vague idea for a summer project, but I need some suggestions.

I’m starting a list of things that I’ve never done before that I would like to do this summer. Some items that already made the cut include baking a cake entirely from scratch (frosting included), watching Star Wars all the way through, and attempting to make a GIF. 

If you can think of anything relatively simple/inexpensive to do that could go on my list, that would be great. Any thoughts are appreciated, even if it turns out I’ve already done the thing you suggest. :)