What can I do with a broken leg?

I'm really bummed and upset that I have a broken leg and I have cast and crutches for another 5 weeks. What are some activity ideas that I can do with my friends outside of my house? I'm really bored and I can't do anything like shop all day with my friends or walk around downtown with people either. What can I do that's fun yet cast-friendly for the next 5 weeks?