Abs

This work out took 3 minute From (Belly Blasting)

Do 12-15 on each side for 2 reps (on each side)

Knee-Cross Crunch

1. Stand with your shoulders in line with your hips, and extend your left arm up and your right leg to the side, toes pointed.
2. Lower your left elbow and raise your right knee, crunching them together on a diagonal line. Return to the starting position. That's one rep. Do 12 to 15 on each side.

Image: Beth Bischoff

The Sprinter

1. Lie on your back with your arms at your sides, legs straight, and heels hovering six to 12 inches off the floor.
2. As you sit up, lift and bend your left elbow, and pull your right knee to your chest, as if you were sprinting. Return to the starting position, keeping your legs raised, and repeat with the opposite arm and leg. That's one rep. Do 10 to 12. (I upped it to 25 reps)

Image: Beth Bischoff

Great work out: This took 10 minutes
Tips: On number 2, make sure you are pulling up by each vertebrate or it is just a great butt workout.
        On number 3, after I did switching legs, I did both legs together.

Abs


And to end it with a good stretch yoga for abs:

http://www.youtube.com/watch?v=iU5l6cFCS08