The app is an ebook with interactive elements scattered throughout the story. Telling the story of how the Avengers found Captain America during their search for a missing Hulk, the story has a number of chances for young readers to become part of the story — using their fingers on the touchscreen to melt the ice that holds Cap or tapping the finger on the bad guys to fling lightning bolts from Thors hammer to send them flying are just a few examples. \r
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The artwork in these storybooks is really great. They feature some limited animation, but nothing overly distracted from the art itself. The style is more painterly than kids will be use to seeing from cartoons and comic books, and fits perfectly in the storybook medium. There is a lot of interactivity to keeps kids interested, such as fending off angry Atlanteans.\r
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Throughout the story kids can collect easter eggs that will unlock new features. I have to give props to Disney for adding a good deal of new content recently with an update to the app. They added in a few minigames, each with levels and achievement badges and upped the value of this app a great deal.