This summer I'm working at a residential care facility for troubled teens. (Many of these guys have seen so much pain, neglect and abuse in their short lives.) Anyway, I'm teaching summer school, and I have a group of girls. Along with math and reading, I would like to give them a great, fun summer. The facility has enough bikes we can fix up, but I'd like to get some ideas on how to get some helmets for them. The administration has approved taking them and a trailer of bikes to the local rail trails for field trips. Any ideas? Thanks.