This site has a bunch of fantastic DIY carnival games and activities. including this simple GUESSING BOOTH.
Lots of simple DIY carnival part games - Prize Board Get the kids excited about the games by showing off a board filled with fun prizes!
Kids' Birthday Party Games: Blow the Duck Down the River: Looking for kids' birthday party games? Children as young as two will enjoy playing a game of Blow the Duck Down the River.
Lots of summer fun! Squirt Gun Water Races Game - Fun Activity Idea for a Kids Summer Party!