Science360 for iPad
Starting the app presents you with a curved mosaic of images that you can navigate by dragging your finger. Click on an image, and it fills the screen, taking you to a story from one of the institutions supported by the National Science Foundation. Then you have the option of downloading an HD version of the image to your camera roll or sharing the story via social media.
Stories range from insect auditory systems to the science of football. The content in the app is definitely geared toward older children and adults, although the main screen is so much fun to navigate that even younger children will enjoy it.