Great way to organize kids' art. Bigger drawings and paintings are kept in A3 storage boxes while their special drawings are kept in these ring binders - one for each year (starting from age 3) for each child.
Not to say that crunches, and other abdominal exercises, don't have health and fitness benefits. However, there is one abdominal exercise you might want to add to your fitness workout. Learn more about abdominal exercises at http://nodiet4me.com/exercise/abdominal/index.html