I liked being able to work with kids to teach them how to swim. I have never previously worked with kids, but being able to make up fun games with them and make them not afraid of the water was fun.
What I wish was different
I honestly don't wish anything would have been differently. I loved the people I taught with.
Advice
Make sure you have a lot of patience. Some of the kids were hard to handle, so it took patience to make sure they were paying attention and not screwing around in the water.