Toys R Us has a HOT $5 off any in-store purchase coupon on their website right now. Just head over to their homepage and wait for the banner below or look for the "Save $5 On Your Purchase" on the right hand side of the screen to get this HOT one-time use coupon.
There are several exclusions but no minimum purchase, so you should be able to get $5 worth of stuff for FREE! Coupon expires 8/16/12 and it's one coupon per "guest." But it looks like you can only print one from each computer, because I printed more than one and it had the same barcode (which I presume means that I can only use one.) You may be able to print ones with different barcodes if you use a different browser (ie. Google Chrome, Firefox) but I haven't tested it.