You've got to stop and visit the Tusayan Ruins if you are at the Grand Canyon. Cool old artifacts. Many things for the kids to learn. Great stories to tell and interesting learning experience. This information is available at many of the lesser known national parks too, but if you're going to the GC get the info here: http://www.ouramericanparks.com/Tusayan-Ruins...

And while you are there you will no doubt enjoy sunrises and sunsets...well at least sunsets. Here are some tips on finding the best spots. http://www.ouramericanparks.com/Grand-Canyon-...