What are some fun hobbies that you don't need two hands to do?

I screwed up my right hand pretty badly and it’s not going to be usable for the next 6 weeks or so.

I won’t be able to do many of my normal hobbies. Shooting a rifle isn’t very easy, cooking with one hand is ridiculous, surfing is pretty much out of the question, and I won’t be able to perform on my beach volleyball team until it heals.

What can I do to replace these activities?