Amazon has started a new section called MyHabit.com and they are offering up a promo code for $25 off any purchase now through August 1st! Just enter promo code SUMMER25 at checkout.
They have some really cute baby onesies in there right now that would be totally FREE with this credit, but most of them are all sold out. I would sign up for an account and check the kids section whenever new products pop up to score something free with your credit.
Go here to register for the free Amazon MyHabit.com site.