I liked that I was outside a majority of the time and that I got to play lots of fun game with kids!
What I wish was different
I would have liked a little more interaction with some of the middle aged kids--early teens is not my favorite.
Advice
Come with lots of energy and a smile! You mean a lot to these kids, and try to have as much patience as possible. Yelling does nothing. Listen to them, and they will listen to you.