Although a number of interactive children's books have billed themselves as being pop-up (or pop-out) books, like The Tale of Peter Rabbit and The Night Before Christmas (both from Loudcrow), nothing really popped up and constructed the 3D scenes that I remember from my childhood. Grimm's Rapunzel - Interactive Pop-up Book from Ideal Binary (US$1.99 for now) does just that, and beautifully. It's a universal app that makes full use of the Retina Display of the iPhone and iPod touch, a
