At one of the water park parties we went to someone brought balls!  Lots of balls!  And they dumped them out into the spray area!  It was a wonderful idea, and the kids had a blast with them!

The balls Ben is holding were squishy and wet, and so fun to through on this hot August day!  They even found that the hollow plastic ones could ride upon the spraying water!  Cheep thrills, but great memories and pictures!