http://www.bestbuy.com/site/As+Seen+On+TV+-+Shake+Weight+Upper+Body+Workout+Device/9897908.p?skuId=9897908&ci_src=14110944&ci_sku=9897908&ref=06&loc=01&id=1218195773039

So, we bought one of these at my work for some sensory stimulation. Totally useless and awkward.

I'm not really sure how it's supposed to work.