A friend turned me on to Globe Genie recently and I won't admit how many times I've hit the "teleport" button so far. Using Google Earth, MIT grad student Joe McMichael's website lets you visit places all over the world - it's like being on Voyagers! without the haystack to fall into.
One minute you're overlooking the heaths of Shropshire, the next you're counting penguins in Antarctica. You choose whether you want to "land" somewhere totally random or filter by continent. Using Google Earth's 360 degree cameras you can explore your surroundings a bit, too.
Not every destination is particularly interesting - you'll find yourself in some boring cul de sacs and on Interstate 35W in Lino Lakes, Minnesota, but it's a fun way to give your kids a glimpse of how the rest of the world lives. From roads filled with motorbikes in urban Asian centers to a man riding a donkey in Brazil.
Beware - Globe Genie is addicting!