Communication EFFECT concepted, launched and executed The Biggest Smile of Greece campaign, for HP Ink Advantage Printers. A crowd sourcing campaign that started out from a Facebook application, included Twitter activations and ended with an event and instore promotional material. The campaign invited users to upload their photograph so as to create a collage with their smiles, designed by Charis Tsevis. Our team desinged the application and undertook the online promotion both of the campaign and the event. For the campaign HP supported the Smile of the Child.