Coca-Cola 'Coke sitelets' by Wieden & Kennedy Amsterdam

Coca-Cola went live with Facebook Timeline last week with a series of riddles.

Fans who solve the first can experience a virtual bonfire at Those who solve a second riddle can go to, which allows users to blow bubbles.

The Wieden & Kennedy Amsterdam work was written by Daniel Maxwell and Ivan Cash, and art directed by Maxwell and Nacho Guijarro.