Volunteering at a summer camp?

I'm volunteering at a camp next week from the 5th to the 9th with two of my friends. The camp is for 3-5 year olds. The owner told us to bring bathing suits because they have a pool we can go in with the kids. Would a bikini be inappropriate to wear? Like I only wear the bikini top and I usually wear swim shorts over the bottoms. Thanks for your help!