A stop motion piece with kids about horses ?

There was a stop motion piece, it was around 76-77.
I remember seeing this before going to school.
There were a bunch of children rolling around on ground and stopping in the shape of a horse.
There were also differn't art images being showen accross the tv screen,
they all metaphorasized in the forum of horse's.
This whole thing was narated by the voice of Mister Moose.
It was such a trip and it was done to tune (with out words).
It almost sounded like the beat to that old tv show Green Acre's.
I really got a kick out of this and would love to see it today.
I have been wondering who made that and where it came from ?
Steve


I'm a Cinemajunkie !