McWorld, an interactive "virtual world" aimed at younger children, was introduced by the McDonald's Corporation in 2008. The online location was accessible via HappyMeal.com, a separate website owned by the company.
The site allowed users to build and customize a "tree house," which served as their own personal spaces within the McWorld environment. Children could also create and personalize avatars representing themselves, which were dubbed "mPals." Accessory items could be purchased for both tree houses and mPals with points earned by playing games and successfully completing quests within the interactive space. McDonald's discontinued McWorld in 2014, shutting down the site on February 7th of that year.