Set up obstacles before class using whatever you have in room. Demonstrate how to go through obstacle course and then let kids go one by one (e.g. Do a Down Dog beside the chair). When group is familiar with the obstacle course, ask everyone to create a new station with a new pose.
Fun way to practice yoga.
Go through course more than once. Adapt to age.
Yoga Lesson Planner
Pilates Lesson Planner