We have the perfect solution for 'tweeners: a day hike at Papago Park. For most Phoenicians, the park is easily reached because of its central location, and it's accessible in other ways, too. Unlike places where existing pathways govern your route, Papago has no formal marked trails, so you can wander where you please for as long (or as short) as you please. There are two regions that are especially amenable for those with younger kids: the area surrounding the landmark named Hole-in-the-Rock (use the turn-in for Phoenix Zoo) and the one located near the picnic ramada on West Park Drive (see the map at the Web site noted above).
The first, in addition to some easy trekking over mild hills, offers access to the Papago lake and all of the many child-captivating creatures who live there. The second is a flat-as-a-pancake washboard plain that provides ooh-aah views of the surrounding buttes and a bounty of wild cottontail bunnies darting in and out of the brush.
Hiking boots are not required, and oh, did we mention that there are bathrooms?