Desktop Catapult
Cheap Disposable Touch Screen Stylus
Electrical Tape "Vinyls"
Balloon Hovercraft
Popsicle stick motorboat
Balloon and tape roll "pea shooter"
Vinegar, Baking Soda, and a Balloon!
Make a gum wrapper bullet! (Or something very similar...)
1 Minute Homemade Dart
Make an Airsoft Machine Gun from a Soda Bottle
Electrical tape knuckles
Watermelon Limeade
Popsicle Stick Bender
Desktop Skeeball
Office Stationery Darts
Paper Folder
Paper turbine