Lovely provides a hot-linked list organized into live journeys, "interactive environments," travelogues, e-museums, building and place tours, map-based visits, and read-along visits.
Think link to The Journal provides a list of 10 top web 2.0 tools for young learners. All are easy to use. If you are looking for ways to use technology with your K-6 students, you will want to check out Gail Lovely's list.