Looks like I could be doing some volunteer work with kids when I'm in New Orleans next month. Anything a naive foreigner should know?

The good news is that I’ll be there for 2 weeks, the bad news is that hubby has to work so I have to find something for me and the little man to do. I’ve contacted a few groups and one got back to me and it sounds really promising. They’re nationwide and legit, but is there anything else I should know about helping out?