"Clearly they haven't done card workouts for push-ups, burpees, lunges, AND squats, WITH laps every four cards.but it is still a good way to shake up your workout routine!" Cool :-) I like the every four cards lap idea from the least pinner.
Diary of a Fit Mommy's 7 Day NO GYM Workout Plan (Diary of a Fit Mommy)
Ballet Abs - I don't remember doing any of these separately (except for crunches) when I use to dance. I got my "ballet abs" by holding it in during class for 10 years; however, these exercises are great for anyone.