Step 1: Get Materials
1 Roll Of Duck Tape, Free
A Few Matchbox Cars
An Electric Model Rocket Igniter
Step 2: Construction
1) Cut A 1/2 inch by 8 inch piece of duck tape.
2) Place engine on roof and tape on.
3) Insert igniter and plug in engine (like A normal model rocket).
Step 3: Watch Out for a Flying Hunk of Plastic and Metal
1)Put car on a flat and smooth surface (road, driveway)
2)Hook up the launcher look at pictures.
4)Watch the car spin, fly, explode(just kidding), and maybe even go strait for a couple of feet .
Step 4: Update
tape a straw to the top and have it run along a string, maybe even have races. and yes this was also made before someone copied it