These are a new way to use water balloons. There is zero clean up on small broken water balloon pieces, they come in a variety of colors, and they are all biodegradable, eco-friendly, and chemical free! They are easy to use and will last all summer long. Each pack comes with two water balloons and each balloon has a thin magnetic seal to keep the water inside until your launched ballon makes impact, at which time it explodes just like a traditional water ballon - but pain-free each time. Pick up the empty shell and submerge it again, for another launch. The perfect solution!