Romper Room Race Track?
 

I used to play with this race track as a kid for hours and hours. Must have gotten it early 80's. My son just turned 4 so I gave it to him as a birthday gift. Every kid at the party loved it and many parents asked about it and had said they had never seen anything like it.
I'm pretty good with google so I figured I would just search and find some out there.

I could find NOTHING?!?

The concept is easy, you have a green and yellow car that lock in a starting gate. You pull the lever (which is marked like a gear shifter) and that section of track lifts up. Gravity takes the car around the track (they cross two places) and the car slips right back into the gate ready to go again.
The only name on it is Romper Room above the shifter levers.

What is this things? It is actually one of the few toys I do not have the box for so really nothing to go on.

thanks