An activity book for children about the September 11, 2001, terrorist attacks being distributed to schools with funding from Keyspan, North Fork Bank, and the law firm Weil, Gotshal & Manges contains pages of "trivia questions" and math problems about the attack. The booklet, funded in part by an event involving Olympic silver medal winner Nancy Kerrigan, is intended to make for "a happy 9/11 commemorative event," said Tara Modlin, the founder of the organization distributing it, Stars, Stripes & Skates."To teach kids about an event so morbid, we needed to make something fun for them," she said. But the...