Mister Rogers plays with cut-outs of the sun and moon. Picture-Picture shows slides of nighttime and daytime skies. Scientist Alder performs an experiment using pulleys. He tries to convince Friday that Edgar needs a vacation. The Neighborhood of Make-Believe segment is a kinescope of "Misterogers" (CBC, May 4) featuring Barbara Bryne. Miss Paulifficate thinks that Edgar should have a vacation.