Old Navy – Buy a $10 Backpack, get FREE Lunch Kit + Coupon This post may contain affiliate links. Please see the full disclosure policy here. Posted on August 7, 2010 Written by Mary 1 Comment Do you still need a backpack for back to school?? If so, head to Old Navy by 8/19 and pay just $10 for a backpack and lunch kit! More details are on their Facebook page! Don’t forget to go HERE and play the game to get a printable coupon.