Kids' virtual-world numbers: Update

Some 8 million US kids and teens spent time in virtual worlds on a regular basis last year, according to eMarketer, which expects that figure to grow to 15 million by 2013. The market research firm estimates that 37% of kids 3-11 play in virtual worlds at least once a month, and 54% will by 2013. According to conference organizer Virtual Worlds Management, as of this past January, there were 112 virtual worlds aimed at people under 18, with another 81 in development. Here's a comprehensive look at a new one aimed at that full under-18 age range, Free Realms, by master moderator of kids' virtual worlds, Izzy Neis.