Shakespeare, NM: If you are into ghost towns, this one is a hit. Complete with old-timers telling the tales and a vault loaded with gold and arms.
Grand Canyon: We rode the train from Williams to Grand Canyon. The kids loved the mock train roberry and the singing cowboys.
Hoover Dam: Park your car on the Arizona side and walk across the dam to Nevada. The visitor's center has a lot of information for free.
Las Vegas: A day trip to Las Vegas was inexpensive. We strolled along the strip watching all the free entertainment (Bellagio's Dancing Waters, Mirage's Volcano, Treasure Island's show, etc.)
Walnut Creek Park: Not very well known, but very educational and oh so pretty. The kids loved searching for the cliffside homes along the trail.
Quick Tips:
Flagstaff has plenty of grocery stores and restaurants to meet anyone's needs.
Leave purses and backpacks in your car if you want to go inside the Hoover Dam Visitor Center.
Bring plenty of film for the Grand Canyon Trip. The views are breath taking from every angle.
Call ahead for reservations on the Grand Canyon Railway.
Shakespeare has limited tours one weekend a month. Check out their website for dates and times.
Best Way To Get Around:
You will most certainly need a car as there are so many places nearby that you will want to check out.