If you haven't signed up for the Pampers Gifts to Grow program, it would be to your advantage to do so. Every package of Pampers diapers and wipes has a code you can enter into your account to earn points. Your points are then redeemable for prizes. You can rack up a lot of points even if you never buy any diapers by entering codes for free points!
Here are the newest codes, worth 70 points total:
WELCOME2PAMPERS (50 points)
GTGTENMONTHCODE (10 points)
GTGFIVEMONTHS10 (10 points)
See all the previous codes I've posted here.