When you are ready, attach the ignition wires from the battery to the igniter on the car. MAKE SURE YOU DO NOT HAVE THE WIRES ATTACHED TO THE CAR AND ...
Just find any hot wheels car that is normal size and all you need is some duck tape, a zip-tie, a hot glue gun, the ink tube in a BIC pen, a model rocket engine kit (your choice of engine type, prefered type is a "C6-5") , and a hot-glue gun. And then just launch it off to have it reach its maximum distance and average speed. Also info on how to make a track for the car is included.
Step 1: First Step
Take your Hot Wheels car, make sure it does not have a heavy weight and take any extra things off of it, such as a spoiler, windows, windshields. Anything extra like that you dont need.