The History Channel's History Here app (free, iPhone, Android)
is great if you're trying to sneak in an educational twist for your
kids over break. The app is map based and filled with info, photos
and video for the historic locations you'll encounter on your trip.
We tested it out on our iPhone around some of our favorite Chicago
spots and loved it. The app is easy to use so even the kids can
play tour guide for a while.