For some bugs, I don't know about wasps, if you fill a jar half full of sugar water and put a funnel on the top of it they will fly down the hole then can't get back out. You might try a couple of jars sitting about 12-15 feet away from the pool. Or, someone on here said that powdered laundry detergent will keep insects away. Of course the kids might have a bubble bath instead of swimming pool. . . .