Here were a few fun games we did for Owen's birthday party which wasn't too expensive.
We went on a golden egg hunt and found small angry bird erasers inside. I used plastic easter eggs, spray painted them gold with a clear coat over top. If there is not a clear coat top the gold gets all over your hands.
We had helium in these balloons and tied them to a brick we used and tied around them. We used small water guns to see if we could shoot at them all. Bigger water guns would have been better and more balloons. Some of them popped from the wind.