According to Scott, "the most popular destinations for both kids and adults are “casual gaming” destinations. For kids and tweens, that means Wizard 101, Poptropica, Club Penguin and Moshi Monsters (which was just valued at $200 million).
While social and chat-based destinations like IMVU and Hi5 fall in second place for the young adult and older crowd, destinations that have a toy tie-in or real world connection, like Webkinz and Build-A-Bearville hold second place for kids and tweens.
However, this VW/MMO type has been on a slow two-year decline, largely as a result of Webkinz loosing significant marketshare over that period, to newcomers like Wizard 101 and Poptropica.
While Club Penguin has dropped in placement on the best top 10 list for kids, it has done a surprisingly good job of maintaining marketshare, loosing only a small percentage compared to Webkinz."