You can make a real jet engine for five minute's work and the price of a spoonful of meths - how cool is that?!?
I doubt there's a better way to re-use all those jars under the sink. Much more fun than a trip to the bottle bank.
Step 1: Materials and equipment.
Stuff I had lying around:
> Pasta sauce jar
> A hammer
> A screw (it should have been a nail, but what the heck).
> A tin tray
Stuff I had to buy: