Aurasma Lite is a free app for iPads, iPhones, and most Android devices (it doesn't work on my Nexus 7, yet). Using Aurasma Lite you can create augmented reality layers, Aurasma calls them "auras," that pop-up when you scan objects with your phone or tablet. In the demonstration that I gave on Monday I attached to a storybook cover an aura of a magician pulling a rabbit out of a hat. But I could have attached an aura of other pictures and videos to the storybook.
Aurasma has more than 100 demonstration and tutorial videos on YouTube. I've included the first one below.
Via Heiko Idensen, ThePinkSalmon