at the end of each u.s. "survivor" season from "" onward, various "survivor" props and memorabilia are auctioned online for charity. the most common recipient has been the elizabeth glaser pediatric aids foundation. most recently, proceeds have gone toward the serpentine project, a charity founded by jeff probst, dedicated to helping those transitioning out of foster care upon emancipation at 18 years of age. items up for auction have included flags, mats, tree mails, contestant torches, contestant clothing, autographed items, immunity idols and the voting urn.