Back in May, multi-billionaire Warren Buffett took a break from his business/investment work to give ukulele lessons to members of Girls. Inc of Omaha -- he previously helped raise money with a benefit concert to purchase ukuleles for the girls.

Local paper Omaha World-Herald picked up on the story, and editorial cartoonist Jeff Koterba mocked up a Ukulele Hero: The Warren Buffett Edition box with the world's second richest man on the cover. The original drawing went on to appear at an auction earlier this month.

Ted E. Bear Hollow, an Omaha charity seeking to help grieving children and their loved ones, hosted a live auction with the original Ukulele Hero drawing signed by Warren Buffett at its annual $75-per-person Comfort Food Classic dinner.

Though the drawing only fetched $600, the fundraising supper and auction brought in $33,000.

[Via Omaha World Herald, SWIowaNews]