Bake up a batch of sugar cookies and let your daughter decorate them. Make them beachballs, or something else theme if you like. Wrap each one with a ribbon and have your daughter give them each one as they leave. It will be a nice sugar rush after the exhausted swimming and no little pieces for their parents to step on for the next three days.
If you would rather something less sugar friendly, find a good recipe for healthy cookies, something with raisins, like oatmeal raisin.
It is a lot less expensive and the kids will love a treat to recharge!
Hope this helps!
S. M
Stork's Best Friend
www.storksbestfriend.com