Mister Rogers tells how the word "glasses" can have different meanings by showing eyeglasses and drinking glasses. He uses a briefcase to show the difference between heavy and light. Scientist Bud Alder visits and performs an experiment. For the Neighborhood of Make-Believe segments, two different "Misterogers" kinescopes were used. One featured Donna Miller (CBC, Nov. 27) and the other featured Allan Blye (CBC, Nov. 28).