Adventure Rock (previously known as CBBC World) was a virtual online world for children based on Ketnetkick, and created by the BBC in association with Ketnet, owned and operated by the Vlaamse Radio- en Televisieomroep (VRT), Flanders' public broadcaster. The game was originally aimed at the Belgian market, but was redeveloped for a UK audience of children aged between 6-12 years old. The emphasis on the system was on safety and responsibility, with no chatrooms or the financial aspects available in other online worlds such as Linden Lab's Second Life.