- Huggies, first off have box tops, but second they have codes for the Enjoy the Rides sweepstakes. You can enter these codes for a chance to win prizes, both big and small.
- Pampers have Gift to Grow point codes in each package. They can be used to redeem prizes (also some big some small). You do have to pay shipping, but during special promotion times, they even waive that (like right now!). I have got a Legos set and a couple of DVDs for my kids for just a few dollars shipping in the past.
Freebies 4 mom (sidebar) also updates special codes that are released to everyone. Don't forget to sign up at both sites to receive coupons, free samples, and other offers based on your child's age. The links for all the baby mailing lists are here, scroll to bottom. Also be sure to update if you move.