Freebies2Deals had a great post on how you can donate your Huggies Enjoy The Ride rewards and your Pampers Gifts to Grow codes to a great cause.

When you buy any Huggies Brand product, there is a yellow code you can enter in online to earn Rewards. You can use these rewards to buy products, but you can also donate them to Every Little Bottom, a campaign that provides diapers to babies and mothers in need. What do you do if you don't have money to buy diapers, 1 in 20 woman wash and reuse soiled diapers! Can you imagine? For only 16 points, you can diaper a baby in need for ONE DAY!
It is so easy to sign up, then enter in these codes to get 33points to donate, that is two days worth of diapers!
BGRCSTFRDJGRPGB (1 pt)
BJQTWZMFQJWFPGB (5 pts)
BGSHBQLWTGRKPGB (1 pt)
BJQRFNCNMCNPPGB (5 pts)
BJLTSTSFXCQMPGB (5 pts)
BGQGLPKMCPXPPGB (1 pt)
BJKFTDXKFHCDPGB (5 pts)
BJKNGQJRMBQRPGB (5 pts)
BJNZKHMLTMXDPGB (5 pts)

If you haven't heard about Pampers Gifts to Grow,
you can go here to sign up. Essentially, every time you purchase a Pampers product, you enter their code online to get free things. In this case, you can donate 10 points to one of two different charitable causes. Almost 4,000 children under age 5 die each day from diseases caused by unclean drinking water, which is more than HIV/AIDS, Malaria, and measles combined. P&G partnered with the U.S Center for Disease Control (CDC) to create the PUR Purifier of Water packet, which transforms 10 liters of dirty, contaminated water into clean drinking water in just 30 minutes. Now through December 31st, 2010, you can donate your Gifts to Grow points to help provide PUR Purifier of Water packets.
10 points provides one week's worth of clean drinking water for children in developing countries. Here is a list of codes you can enter to get started:
2BEGINEARNING50 (50 pts)
GIFTSTOGROW4MOM (60 pts)
FacebookOct2010 (40 pts)
JOINNOW4REWARDS (50 pts)
Remember, 10 points will provided 1 week's worth of clean drinking water! If you donated all these codes, that is
20 weeks of clean drinking water!
I am excited about these causes because I get all my diapers really cheap, so it isn't a big deal to sign up, and donate these points!
Even if you don't have a baby to diaper and if you have clean drinking water, help another baby instead!