: Fourth-grade pranksters George Beard and Harold Hutchins hypnotise their principal, Mr. Krupp, into becoming their comic book superhero creation, Captain Underpants. Availability and Purchasing Options
In the official e-book and PDF versions, developers had to get creative. The full color PDF usually shows the two frames side-by-side with a tiny arrow suggesting you “flip” (which you can’t do on a screen). The Kindle and Google Play versions add a "simulated flip" button. captain underpants 1 full color pdf