New Rocket Powered Matchbox Cars! - Extreme!

Step 3 And...

you need something to guide the car on it's track. Without this, the rocket shoots the car and rolls it, flipping and tumbling across the 'track'. I used a coffee stirrer and after cutting a small groove in the bottom of the car, cut it to size & glued it in place. This is the perfect diameter for the string that the car rides on.