So here's the situation. Summer holidays, the planned job I would've had ends up not happening. I have nothing to do during the week (originally I'd be out longboarding every day but a couple of mates got jobs etc, now weekends are only available for that kind of thing). I'm currently searching for summer work, but a back injury I got a while back stops me from doing anything too physical for extended periods, which rules out like 70% of the jobs available.
I don't want to play video games or read books all summer, I want to get out and be active, or actually doing something useful. Learning a new skill would be fantastic. Any suggestions?