Here is how to make your own jet enigne to power your wacky vehicles
http://www.instructables.com/id/How-to-build-your-own-Jet-Engine/
In this experiment, students will use a Force Sensor to discover the purpose of an air bag during a collision.
http://www.pasco.com/experiments/physics/march_2002/home.html
Learn to make an energy machine with birthday candles and popsicle sticks.
http://www.energyquest.ca.gov/projects/candle-spinner.html
The purpose of this experiment was to see if the temperature of the barrel affects the accuracy of the bullet.
http://scssi.scetv.org/mims/schools/blhs/science/y99/treyb3.htm
You may find that a file-card bridge can hold more pennies than you'd think! Here are the results of the file-card bridges that the Science-at-Home Team built.
http://www.exploratorium.edu/science_explorer/card_bridge.html