Quote:
"At the time of the wartime concern with nutrition, Gudrun [Bjerring] was asked to make a series of films for very young children. This was her first real assignment, and though the films were very short, just four minutes each, she had to bone up on vitamins from A to—well, E. The nutritionists gave her the facts, but the problem remained: how to persuade the children that they should like what was good for them? It's an old question; and it was John Grierson who suggested using rhymes to carry the message of the script. One went: 'A is for Airmen, whose vision is keen; their diet has plenty of carrots and cream'. Perhaps the rhyme isn't very good, but the reactions of the youngsters were excellent, though Gudrun isn't convinced they all ate up their carrots as a result."
-- Elspeth Chisholm

Source:
Chisholm, Elspeth. "They make movies." Chatelaine, April 1946. (pp. 82-83)