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.