Our last water balloon activity completely bombed. Oliver still wanted to play with water balloons, so I filled another dozen or so and took him out front. I told him to throw the balloons. As soon as he threw the first one and watched it explode all over the sidewalk, he was hooked.
Some of the fun in action:
The activity only lasted a couple minutes. Oliver was a little water balloon machine gun. After he threw the last one, he cleaned up the busted balloons, and we went inside to do some rock painting.