Balloon Tennis ~ Fun idea for the kids. Everyone likes playing with balloons! Decorate/personalize the plates.
DIY Glow Jars, NOTE: Adults should make these jars, and then the kiddos can enjoy them in the dark
Sparkle Balls! Plastic cups stuck together, with Christmas lights inside. Full tutorial at link
Beer Pong | 31 Rad Group Costume Ideas To Steal This Halloween