That is being done for my final project. I am following this concept: http://sci-toys.com/scitoys/scitoys/electro/railgun/railgun.html With the aluminum strips and thinking of making a race car and placing it on it. Now, would there be any restrictions on designing a race car with 4 disc magnets as its wheels, using straws as it's axles and maybe a match stick box as the body? would weight be an issue to carry the car along the aluminum strip when the alligator clip leads are connected? or am I good to go?