Cerebral

"Whether you're a zombie, a neurologist, or something in between, you're sure to appreciate a little more brain power. Three brain images on a blue background make a yummy set of magnets for giving or keeping (but please don't eat!)....

Large glass marble, approx. 1.5"
Small, strong neodymium magnets; each reliably holds several sheets of paper.
Set of 3.
Includes an unbleached muslin drawstring pouch stamped with the CrowBiz logo - perfect for gift-giving."

Found at CrowBiz's Etsy shop.