If you've been snapping up boxes of Pop Tarts lately - either through the Kellogg's Fuel For School Promotion or with the Target giftcard offer a couple of weeks back - check the back of your boxes! Some of them have an offer for a free children's book when you send 2 proof of purchase tokens on the back of the box. I ended up with about 8 boxes of Pop Tarts after all of that and some of them did have this promo, so I guess the kids will be getting some new books just in time for the chilly weather. I noticed this is only for boxes actually purchased at Target. The form to send in with your tokens is here.