September 2013 - Toys'R'Us has sent out a mailer with coupon for 25% off your entire "regular-priced, sale and clearance in-store and/or online purchase" when you use your R'Us credit card, good from September 19 to 21.
Use code FRIENDS25 at the checkout if you are shopping online.
Additionally, if you do not have an R'Us credit card, you could use code FRIENDS20 to save 20% instead.
Both the 25% and the 20% coupons can be printed to use in-store: head to http://Toysrus.com/friends to print them. (Just in case you have trouble with that link, that short url resolves to http://www.toysrus.com/shop/index.jsp?categoryId=22728306&camp=MISC:Vani....)