iPods with GPS software

My 12 year son suggested that Apple look into the idea of putting GPS devices into iPods. Then as a student walked around a campus, he or she could hear and see a lesson dealing with that particular item on the campus. The item might be the reference room of the library. A tutorial on the use of the reference section of the library could either be pre-installed on the iPod or possibly there could be a computer in the library that contains the tutorial files that could be downloaded onto the iPod. Or maybe the item is part of the outdoors such as a pond, where the student could learn about the ecology of ponds.