I collect Hot Wheels muscle cars, and race them on my scale(1/64) 1/8 mile drag strip. I made the dragstrip itself from long shingle strips, and scratchbuilt an Xmas tree, and a finish line scoreboard(Or whatever you want to call it). I do bracket racing, to keep it fair.
I know, I'm 12 years old and still play with Hot Wheels. But it's a good pastime! But not to brag, I think I have the most accurate 1/8 scale mile Hot Wheels drag strip in the world