I had sooo many of those when I was a kid. At school during recess we would make huuuuge tracks for them in the dirt. We would bank the corners so the Stompers would follow the track around turns and stuff.
After a while we started modifying them to race at school. Just added batteries and stuff like that. After a while, some kids started stacking watch batteries in series to produce more voltage. Granted the batteries wouldn't last long at all, but they sure would haul ass for a little while.
...and there was the whole never ending argument about which was better, the Stompers or the Rough Riders?