Never tried one of these so I don’t know how well they work, but from the TV commercial I thought it looked pretty cool.

WaterBall Launchers use the natural surface tension of water to launch balls of water. Just pull the handle back and fire, and a ball of water will fly through the air, retaining its shape until it hits a target.

There are two sizes so far. The small launcher shoots 100 water balls before it needs to be refilled, while the large launcher shoots 175 water balls.

website: www.waterball.net