Note: Not valid until 5pm on Friday, expires 12/24/12, only valid in store.
If you don't spend it before the expiration, Groupon will refund you $10 in Groupon credit.
You need to buy this deal by Sunday, 11/22. It might sell out before then.
(The link should take you right to it. It's not a Phoenix area deal, but is valid at any Toys 'R Us.)