I had one of these when I was around 8. Was really fun to go down a hill and pick up speed and slam the handles in opposite directions real fast and spin around a bunch.. of course I would wipe out about every other time.
Remember this guy?
He was supposed to be unbreakable but I had the unfortunate luck of getting one that ripped one day when a friend and I had him streched about 10 feet. The shit inside splattered and stuck to the concrete and was there for at least a year. Weird stuff..
Gee-whiz there were some cool toys back in the '70's..