Most people don't take the time to peel off the sticker that comes on the wipe packs, diapers, and pull-ups. I didn't do it when I had the first 2 boys and now wish I had. Huggies and Pampers both have reward programs that allow you to get toys, gift cards, free diapers and special discounts just by entering in these codes. They both work the same and just require you to enter in the special code found on the inside of diaper and wipe packs. This is how I get most of my gift cards (Applebee's, Dairy Queen, Sam's Club, etc). The prizes change often so make sure and check frequently.
All my friends need to do this to cash in on cool stuff!