Water balloons by the dozen

We bought a special nozzle that helps easily fill and tie water balloons, so Andrew's favorite summertime activity is no longer the bane of my (and perhaps his Uncle Neil's) existence. We've been having a lot of fun playing a game called "Toss the Water Balloon into a Bucket and Win a Nickle."  Unfortunately Andrew is getting a little too good at it.  I might have to roll back the prize money.