Carla, you may have the two shuttles mixed up. The Sabino Canyon shuttle goes "to the top" (of the canyon), and, as mentioned below, has numerous stops (nine, not eight). The Bear Canyon shuttle makes just three stops, and... More
Carla, you may have the two shuttles mixed up. The Sabino Canyon shuttle goes "to the top" (of the canyon), and, as mentioned below, has numerous stops (nine, not eight). The Bear Canyon shuttle makes just three stops, and is the way to save some time and energy to Seven Falls. There is a bathroom and water fountain at stops 2 and 3, and another spigot with potable water about a half mile further (next to what looks like a bus stop). From stop 3, it is about 2.5 miles each way.
We have no way of knowing if your child can do the complete hike. It would be better to start off on something simpler (hiking and navigation-wise) to see how he/she does. It can get quite warm in the afternoon on the way back, with heat radiating off the rocks, and dehydration and heat exhaustion are real risks.