Point your camera to a flat area of the room, and start tapping on the screen to "dig" up a fossil, using AR (augmented reality). The basic idea of this app is solid -- it's fun to see what you'll find. But there's not much content, and the interface has a few snags. For example once you're in a "dig" you can't escape until you've examined each of the hot spots. While the replicas of the fossils are scientifically accurate, the other illustrations are limited.