ColAR (iOS/Android) is “the coloring book of the future.” As TechCrunch explains,

First, you go to colAR’s web site and print out your coloring page of choice (the free app usually comes with one option included and a few others available for in-app purchase, but their full catalog is free until July 28th)… Once you’re done [coloring], pop open the app, and hit the “Play” button to bring up a camera view. Hold your drawing up to the camera, and bam! It takes your work of art and wraps it around an animated 3D model.

If only one could draw a Centrifugal Bumblepuppy in this thing, it would be perfect. (Or my head would explode. Or both.)