I saw this short in Barcelona (Spain) in 1967 in a Sunday matinee when I was 8 years old, accompanied by my grandmother- together with the Cinerama/Cinemiracle "Windjammer" film, and I never forgot it . I remember perfectly the almost absence of dialogue, and the skate scenes in the streets with the kids. I also remember but not very certainly because sometimes memory fakes- that Beach Boys "Good vibrations" was in the soundtrack . And, after the short, red curtains open and open and open. and widescreen Cinerama film starts
but this is another story. Sweet memories, sweet childhood!.