Here is an easy way to make a propeller powered Hot Wheels car.
Sorry for not having notes, they loaded rlly slow so i gave up on them
Step 1: Stuff You Need to Get
A Hot Wheels car
a small motor with a propeller
Double A Battery
Soldering iron and solder
Step 2: Assembly
Solder the positive wire of the motor onto the positive contact of battery
then tape the battery on top of the car, closer to the rear
and then glue the motor onto the back of the battery, making sure the propeller is in the back and can spin
if not raise it up with cardboard
Imagine what the car in the below picture will look like.
Step 3: Operation
Put a piece of tape on the negative wire of the motor. Then tape it to the negative side of battery. Put it down, give it a little push to start, and watch it propel itself across the floor. Have Fun.