When the boys join a soccer league, they learn that not everyone has learned the same sportsmanship lessons that are taught at their parents' karate studio.
When Marshall, Art, Donovan, and Dominick encounter a stranger who tries to get them in his car, they use their heads and the stranger danger lessons taught at karate to get home safely.
When the new kid at school takes Marshall and Art behind the mall to show them his artistic talent, the boys give a lesson in community service and friendship.