I've always thought the idea behind
Window of the World was a cool one. Sure it's probably really dumbed-down and not at all like seeing the real thing (and maybe some of it's in no way educational), but for kids it could be a really cool way to learn about a whole slew of different cultures and history. All in one easy-to-navigate location. A lot cheaper than flying all over the world at least!
If you do check it out let me know if it'd be worth my time.