In Yoga: Suggestions for Ab exercises that can be done standing up

Anyone have suggestions for ab exercises that can be done standing up? I get dizzy and bored doing regular crunches. Looking for some exercises that are fun and work! Bob "The moment of enlightenment is when a person's dreams of possibilities become images of probabilities." Vic Braden "The journey is the reward." Posts by members, moderators and admins should not be considered medical advice an ...Yoga