Volkswagen launched The Fun Theory campaign to promote their more environmentally friendly BlueMotion cars. The campaign used videos online showing how small acts that are fun can inspire positive behavior change. This garnered significant attention globally. While not explicitly an ad for VW, it subtly promoted their new efficient yet stylish BlueMotion models. The campaign engaged viewers and encouraged sharing the videos widely on social media. This raised awareness of VW's green credentials and led to more BlueMotion cars being sold internationally, demonstrating how fun marketing can effectively promote products and influence consumer behavior.