Explorer: The American Museum of Natural History is a great iPod app for the purpose of touring the museum in New York City. Not all the features are available since the user is supposed to actually be inside the museum while it is in use. This mostly includes the mapping portion of the app. However, it will provide a great virtual tour for students with short snippets of facts about the exhibits. You as a teacher could create a questionnaire/scavenger hunt as the students visit different parts of the museum. It would be a fun way to take a field trip...without the worry of losing a student. You could still have parents come in as chaperones!