@Shawn's not the only one who can build things! I'm going to put together a whole car, using a screwdriver, a hammer, and, uh, some plastic and metal I guess? I'm hoping it'll turn out something like this:
First up, I think you need a steering wheel. I mean...there's not one in that picture up above, but I'm guessing you drive that thing around with your mind or something, and that sounds a little beta to me.
I don't think I'll keep track of my expenses as closely as @shawn did, but lets just say I stocked up on a good bit of beer to make sure this all goes smoothly.
And just in case you think this is all just snap together, here I am installing the all-important door lock. You've got to keep these things secure, otherwise someone will just drive off with your car.