If you have never tried it before see here
All about it:
Amazon Mom is a free membership program aimed at helping parents and caregivers use Amazon to find all the products their family needs. Benefits include 20% off diapers and wipes, FREE Two-Day Shipping, and exclusive deals.
To join, simply sign into your Amazon account and tell us whether you are a Mom, Dad, or other caregiver of a child. By providing some information about your family, you can help us personalize offers, e-mails, and product recommendations to help you find exactly what you need at just the right time.
Your kids are older than toddlers? No problem, you can still join Amazon Mom, just understand that some of the key benefits are specifically aimed at younger children (such as our 20% off diapers promotion).