If you are not yet a Toys R Us Reward Member you should sign up if you plan on doing any shopping at Toys R Us or Babies R Us now through Christmas.
They are offering 10% back on all purchases 10/31 through 12/24.  I figure if you are shopping there you might as well get the free perks!
Here is the fine print: Enroll at any Toys“R”Us or babies”R”Us store or online. Valid 10/31/10-12/24/10. Rewards certificates sent via email after 12/24/10. Excludes purchases of gift cards, shipping and handling charges, and reward eligible greeting cards, formula, diapers and LeapFrog products. see a Team Member or Toysrus.com/rewards for maximum rewards and complete details.