Good abs workouts?

know any good quick abs workouts

Leg lifts work the lower abs. Crunches work the upper abs. I use a yoga ball and it works great. Also if you want definition you HAVE to work the sides of your stomach as well.

flutter kicks, lay on your back with your legs atleast 6 inches of the ground at all times and alternate kicking your legs up and down, and than just hold them at 6 inches. crunches also work great or doing sit ups with sand bags or dumb bells or soething.