Balloon Ping Pong- super idea for indoors in hot summer!
"Make balloon ninjas to fight (or shoot w/nerf guns). How fun!"
Pop Goes the Pumpkin Game, would also be a great Birthday Game.
Back Yard Bowling Alley: Make glow-in-the-dark "pins" by adding light sticks into each bottle. So fun!
the motherload of party ideas:)
Paper plate ring toss...
How to Make a Gumball Necklace- cute party favor
Hoola hoops duct taped to each other to create four extra basketball hoops. How lovely!