THE SHOW is not without con- troversy. Still, there's barely an American kid who hasn't tuned in to "Sesame Street," which yesterday celebrated its 40th anniversary.

Although there were popular kids' shows before--"Captain Kangaroo" and Washington's own "Pick Temple" spring to mind--"Sesame Street" was the first to incorporate modern educational research and techniques into its format. Featuring Muppets created by Jim Henson (another Washingtonian) as well as live actors and animation, "Sesame Street" aimed to prepare kids (especially those in lower-income families) for school. Numbers, letters, concepts (like "over" and "under") and even social constructs like diversity, life, and death are given quick, lively treatments designed to capture kids' attention--and amuse their parents.

Over the years, some have objected to the show's short segments, lack of women, lack of Hispanics, depiction of single mothers, etc. Still, comfortingly predictable Bert, Ernie, Big Bird, Oscar the Grouch, the Count, et al. have won their places on the American mural. Who can't identify with Ernie coping with an endearingly frustrating friend? Or a giant bird who is shy? Or feeling so grumpy you'd like to hide in a trash can?

"Sesame Street" has won 119 Emmys in its run, more than any other TV series. For creativity and longevity, give the show an "A"--for admirable.