Our neighbor has a pool and our son goes down there all the time. For their son's birthday they bought a bubble blower. The boys had a natural lesson in surface tension. When they got out of the pool and went and stood next to the bubble blower the bubbles would stick to them. As they dried off they popped. After they were too dry the bubbles popped as soon as they touche teir skin. They were entertained just jumping into and them out of the pool, getting covered in bubbles, watching them until they were too dry and then starting over again!