This Gaiam Balance Ball Chair drops from $99.99 to $89.99 in your cart, then again to $67.99 with codes ALLDAISIES and MOMSDAY10 at Kohls.com as a Mother's Day Special through 5/9. We couldn't find this chair under $80 anywhere else (see here where over 1,000 reviewers give it 4.4 out of 5 stars). It's designed to improve posture and strengthen your core while you sit. Pad your order to $75 for free shipping, otherwise it adds $8.95. Sales tax is charged in most states.