The Swedish Post is in a gift-giving mood, spreading joy over the Web via free gifts provided that users join in on the world's largest memory game ever made.

There's a lot of interactive advertising, but it is more often than not restricted to the location the campaign is held in. Designed by ad agency Akestam Holst, the online interactive game Parcel Memory allows Internet users worldwide to participate. Like Memory, players can choose two of any of the 400 green boxes sprawled over the 2,580 square foot-warehouse and postal workers will flip them over to reveal whether the image on the underside matches. If they do, players can receive the gift, which is shipped to them despite location courtesy of the Swedish Post.