I remember this old cartoon about a boy who had a white horse toy and he would dream that the horse could fly. Does anyone remember it and know what it was called?

I did a google search which led me to toonarific.com
The name of the cartoon was called: LUNO, THE FLYING HORSE
It's original airdate was 1965, it was a segment on the "Astronut Show".
The little boy's name was Tim and he would say the magic phrase "Oh winged horse of marble white, take me on a magic flight." The voices of both Luno and Tim were Dayton Allen.