THE WRONG SIDE OF THE BED 3D

For readers still unconvinced that the features of the iPad can translate printed children's books into full-blown multimedia experiences, this one will change your point of view. Based on Keller's 1992 book, the app tells the story of Mott, a young boy who wakes up on the wrong side of his bed. Not the left or right side, but the underside. The world has turned upside-down (or perhaps it's just Mott), and he spends the rest of the day walking on ceilings and, eventually, slipping out of Earth's gravitational field altogether. The story makes sophisticated concepts of physics and perspective accessible. It cleverly explains the conceit, "If there's a left side, then there is a right side, and if there is a right side, then there must be a wrong side, right?" The app can display the tale in 2-D or 3-D, but even in 2-D, Keller's skewed views of vertigo-inducing bus rides (not to mention breakfast served on the wrong side of the plate) are gorgeously rendered. Unobtrusive instrumental sound effects punctuate the read-along narration, animations are minimal but effective and Mott's audio reactions can be heard by tapping him. In 3-D, the app soars even higher; the effect works well even with cheap red/cyan glasses (available for order through Amazon.com from within the app for as little as $4 for three pairs). The pages work just as effectively when viewed upside-down, a good reason for repeated readings. (iPad storybook app. 4-10)