With straight faces and high spirits, Johnson and Carter (Never Babysit the Hippopotamuses!, 1993) offer reasons for the command of the title, e.g., ``Elephants are good at math and love to give answers. While waiting to be called on, your elephant might get excited and wiggle around in his chair. Elephants can really wiggle!'' The understated wit of the text is comically complemented by the zany watercolors of wreaked havoc. Both the words and art make use of every opportunity to mock teachers, but it's all in good fun. (Picture book. 4-6)