Looking for Low Cost or Free Summer Camps and Advice..Please Help

I'm searching for low cost or free Summer Camps for my daughter who is turning 11 yrs old July 1st. If you know of any in Philadelphia that actually does activities with the children and maybe takes them on a few trips during the summer please let me know what they are. Also, I work full time and usually my mom would take care of her for me during summer months but she is really not in the condition to anymore she's been sick a lot lately. So I'd like to get her involved in a camp for summer. She's really shy and I think this would be a good way for her to get involved meet new friends, get some exercise and enjoy going on trips. She's really against going because as I've said she's very shy. I'm trying to figure out how to explain to her what a great experience camp would be for her. I had the same problem when I thought about getting her into the girl scouts, glad I didn't spend any money on it before she told me she didn't want to go. Personally when I was small I wanted to do all those types of things like learning to play an instrument, going to summer camps where you stay all summer, taking up dance classes, joining girls scouts, etc. But my mom was raising 3 of us alone, so we couldn't afford to go and do these things. I don't want her to go through her childhood and miss out on these opportunities that I'm willing to give her a chance to par take in. She really likes to draw and I was thinking that next summer I would sign her up for an art camp so if anyone knows of any in the Philadelphia, Pa area that are good for kids her age let me know.

Thank in advance
Q.