It doesn't always take elaborate production design to get children to participate, as illustrated by two new unassuming, small-format picture books, both of which would be welcome diversions on an adult's coffee table. In "Ice" the latest tale by Arthur Geisert, a 1996 winner of a New York Times Best Illustrated Children's Books Award, the author's familiar community of pigs returns for another wordless adventure. Here the troop of porcine adventurers set forth from their parched island in a flying boat in search of a new energy source.