Can anyone tell me what the cheapest and most pratical way is to make a suitable device to track people. I have been experimenting with many things without having to pay any money atall, and so far a wheel chair has worked best for me lol. Any ideas would be helpful. Thznks!

The wheel chair is an excellent way of making a dolly, Robert Rodriguez did it. Although if you are looking to make a dolly go to Joren Clark.com or Ron Dexter.com.