The past two summers I worked for a day camp that catered to the kids at my school. We spent two hours a day at the pool! yes, I had to get in the pool with them. I didn't wear a bikini, but I did wear a swimsuit, a tankini (the two piecers with a tank top). The kids were fine around it. They never mentioned it and it didn't effect (right word?) them come school time. And I had at least five of them in my class! They had a harder time calling me Mrs.... instead of Cindy!
Have fun this summer and remember to wear sunscreen!