THE GOING TO BED BOOK

Preserving the look of the classic board book—even to the trim size and rounded corners—this makeover folds new into old in such inventive ways that it may take more than a few passes to discover all the interactive features. Aboard a ship that rocks in response to a tilt of the tablet a set of animal passengers bounce belowdecks. First they take a bath featuring user-created bubbles, and then they brush their teeth using water so hot that the whole screen hazes up with wipe-able “steam.” Pajama-clad, all then wobble—or, tweaked by a finger, rocket—back outside for a bit of exercise before bed. (Readers control this part by twirling the moon.) In the finest animation of all, every touch of the night sky in the final scene brings a twinkling star into temporary being. Along with making small movements that resemble paper-engineered popup effects, Boynton’s wide eyed passengers also twitch or squeak (or both) when tapped. And though they don’t seem particularly sleepy or conducive to heavy lids, an optional reading by British singer Billy J. Kramer (whose well-traveled voice also pronounces each word individually at a touch), backed by soothing piano music, supplies an effectively soporific audio. “The day is done. / They say good night, / and somebody / turns off the light.” This is as beautiful as the developer’s earlier PopOut! Peter Rabbit while styling itself perfectly to Boynton's whimsy. (Ipad board-book app. 1-3)