Building A Toy Motor Building A Toy Car With A Motor?

Building a Toy Car with a Motor? - building a toy motor

Hey, my physics teacher had us a project that we have to build a small car with an engine operating mode. We need to buy an engine with a battery or something and I did it as a base with wheels or something. I am doing what is entirely lost. How do I do that? Do I have a small engine from a shop, or what? How to Place together and make them disappear?