In a contest children can suggest a name for this world and then vote on it. At the moment they can choose between ScaddImon (a mixture of McDonalds letters), McD Zone, McDonaldLandia, McIsland, McWorld (of which the last is winning and the .nl domain name is still free too.) There's also a link to the physical McDonalds: who enters a code from a Happy Meal box or bag, or other products, can gain exclusive items.
Future Vision by Erwin Van Lun on this article
This is how brands realize brand worlds’ that are furnished by consumers, their fans. Those brands are only made stronger by this.