We did enjoy it quite a bit. Make sure everyone is in good physical condition. The South Kaibab Trail to Phantom Ranch, a guest facility on the Colorado River, is a seven-mile hike. There is no water and little shade. The Bright Angel Trail is 10 miles long.
Water is available at Indian Gardens, roughly the halfway point.
Both trails cover nearly a mile in elevation change. Plan to dress in layers and avoid cotton. Backpacks should fit properly and be large enough to accommodate what you need for the length of your trip. Boots are important in the Canyon - and lots of socks. Moleskin, which prevents hot spots from becoming blisters, should be part of a first-aid kit.