I've got an idea!

Lets build a racetrack for nitro cars...............................

First lets get some dirt..................................................................
This is too much like hard work.......What we need, is a big digger!
The jumps are a bit lumpy, we might need a roller...........
Many hands make light work............
Time for a break...........
Oh no! Where we gonna stand? Best build a Rostrum............
 

Done...................