hotwheels tracks...
 

My son and I have been playing with them on some hotwheels tracks! Pretty neat when you have the banks on them to. It works pretty well and fits them perfectly. Just can't build them to high.

And the other cars such as MicroSizers and clones can run through it really well.

How well do the tires grip? I can think of some nasty banks, curves, and hills!:D

I'm thinking about adding a "bonus" loop set up to my track so if you're daring, and hit it right, it would set you down farther along the track than not taking the loop. Hard to describe, but you'll get the idea if you try it. Also, something made for MicroRC.....Lego bricks!!!!! quick change race tracks, buildings, bridges, crash walls.....you name it!