Though he is a teacher at heart, Don Herbert hates the dry stuffiness of a classroom as much as any truant schoolboy. On Mr. Wizard, his popular science show for kids (Sat. 5 p.m., NBC-TV), he uses brief, ad lib comment instead of hectoring lectures, everyday objects like balloons and tumblers instead of beakers and fractionating columns, and he would rather conduct his experiments with a potato or a spinning top than with test tubes and Bunsen burners.
Herbert's object is to show his audience (estimated at 850,000) what goes on in the world—why the wind blows, what makes a cake rise,...
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