Coke Bottle Rocket Car
With a simple coke bottle and mentos (and wheels) you can make a soda rocket car.
Supplies
1L of Coke
Skateboard or 4 wheels
A way to mount the bottle to the wheels/skateboard such as tape
5 or 6 mentos mints
Step 1:
Tape the bottle with coke in it onto the skateboard/mount the bottle onto the wheels.
Step 2:
Wrap the mentos longwise with masking tape to make a sort of package. The sides of the mentos should be exposed.
Step 3:
Take off the cap of the soda and put the package in. Quickly screw the cap back on and strike the cap with a hammer, stick, anything long enough to be safe but still have enough force to get a good hit on the cap.
Step 4:
If everything goes right the bottle should blast off and the car will shoot forward.