Is your kid heading back to school? eBay's Back to School Sweepstakes will award daily winners a $100 eBay Gift Card to shop for their back to school essentials on eBay.com. All you have to do is create a backpack pin board on Pinterest with school essentials you'd buy to fill your kid's backpack. Name your pin board "eBay Backpack #eBaySchool" and then fill out the registration form at www.ebay.com/pinterestsweeps. It's that easy!