Heckles at wrist and ankle
Set this one up with a "sticky" wrist and ankle, then add small heckles as desired. The idea is to challenge your partner's balance to just the right degree. This is not a contest. Rather, the idea is to educate your partner's body for greater stability, responsiveness and physical intelligence. Plus, it's really fun. See exuberantanimal.com for more ideas about playful, functional training.