Secure all the parts and give it a test run. You will have to pull it a few times to charge the capacitor--then the light will stay on for quite a w...
In this instructable, I take a radio controlled car and convert it to a friction powered illuminated car--with ultracapacitor energy storage. You pull the car along the floor and the led on top comes on. The one farad (not microfarad) capacitor (under $4.00) keeps the light on for half an hour or more.
Start with a radio controlled car--one where the wheels stay engaged with the motor. Some of the cheapest cars have a slip arrangement in the gearbox for changing direction. We need a vehicle which is either tank like (left side on or right side on) or one with geared drive wheels and proportional steering. I've suggested one from Amazon.com that works.
Bio:My book, A BEGINNERS GUIDE TO 3D PRINTING: 14 SIMPLE TOY DESIGNS TO GET YOU STARTED is now available. If you want to design your own stuff, but thought it was too hard to learn, it isn't. Take a look....read more »