Gaiam 6-Pound Abs Ball Workout Kit $6.86 free shipping with Prime (FSSS)
from Amazon
Product Features
Six-pound abs ball workout kit for efficiently sculpting your core
35-minute workout DVD hosted by Ironman triathlete Jonathan Roche
Sure-grip, six-pound ball offers pair of handles for easy holding
Link: http://www.amazon.com/Gaiam-6-Pound-Abs-Ball-Workout/dp/B000PHB