Since the offer is through livingsocial.com, you'll need to register for an account if you don't already have one.
The Big Deal: Save 50% off toys and birthday gifts
Today's offer is for YoYo.com through livingsocial and you can pay $10 to get $20 worth of merch, and if it's your first order on the site, they are currently running an offer of free shipping for a $20 order.