NASA's Lunar Electric Rover Simulator is a free iOS app that lets you explore the moon. The app is really a game in which players perform tasks to support the activities of a lunar outpost. Players transport items from place to place and along the way encounter lunar challenges to overcome. The app also includes an interactive gallery of images. You can download the app for free from iTunes.
Applications for Education
The Lunar Electric Rover Simulator app appears to be similar in purpose to NASA's role playing game Moonbase Alpha. Like Moonbase Alpha the game could be a good way for students to pick up some knowledge about lunar exploration while having fun playing a game.