Assorted Color Water Bombs 60ct 2 3/4in Latex Balloons. They could be an ideal amusement at a nearby park and invited a dozen of C's school friends and cousins. And yes, it involved a trip to Home Depot and a great hose bib attachment for filling. Be sure to advise parents to dress their kids appropriately as they will get wet. We did two experiments that quickly demonstrate the effects of static electricity.