core moves

www.healthkicker.com/740746533/you-know-you-want-sexy-abs/

Stability Ball Roll

http://www.workoutz.com/exercise/stability_ball_roll

Ab Twist

http://www.livestrong.com/video/4152-core-movement-ab-twists-with/

No Gym Required

http://www.shape.com/fitness/workouts/ultimate-arms-and-abs-workout

Stability Ball Rollout 

http://www.shape.com/fitness/workouts/trainers-reveal-best-abs-exercises-all-time?page=11 

Abs

http://www.shape.com/fitness/workouts/10-tricks-amp-your-favorite-abs-exercises