Science Camp: Mad Science Day Three

I'm publishing links for the activities we're planning for next summer's science camp so you can start saving materials.
Day Three: Catapults, Launchers, and Magic Tricks

1. Catapults and
2. Trebuchet
3. Launchers
4. Hot Wheels and Go Pro
5. Paper Airplanes
6. Roto Copters
7. Balloon Helicopters
8. Jumping Pepper
9.Balance nails trick
10.  Straw through Potato
11. Balancing Bird
12. Centripetal Force Board
13. Egg Toss
14.Marshmallow slingshot
15. Spoon Frog Minute to Win It
16. Stacked Ball Drop