KidZui, a San Diego based web start up has just raise a sizable amount of investment capital from some blue chip VCs to join the very crowded kid and tween-focused category led by Club Penguin and Webkinz. The upstart has raised a total of $8 million so far from firms including Maveron, the venture capital firm of Starbucks founder Howard Schultz. Other firms backing KidZui include Emergence Capital Partners and First Round Capital. My first take is that KidZui's institutional backers will probably not see a great return on their investment in the kid-focused start-up. I honestly think their subscription-based model will not work and also question some of the metrics they have released previously. Before jumping into their stats, lets consider their competition. The 900 pound gorilla in the room is Webkinz, which diffrentiates itself from KidZui as a entertainment service with multiple revenue streams. They have an extremely loyal following of kids, just ask any of our younger tween panelists. The other key player in the category is Disney-owned Club Penguin, another subscription based model. Both services have sizable existing membership bases and real revenues. The problem I have with KidZui is their value prop. They aren't really a true subscription based service, instead they're really just a software app. The essence of the app is a filter like service that reviews sites they deem to be kid friendly. In total, according to their release, they have approved half million sites, images and videos. To reach this number they have 200 "editors" which means each editor, on average, has reviewed 2,500 sites, images or videos. That seems a little aggressive. What seems even more unrealistic though is their subscription model. Their hope is that parents sign up for the service by paying $9.95 a month or $99.95 a year, download their browser, have their kids create a profile avatar and surf away on the 500,000 or so sites and surf away. Frankly, I don't think the majority of kids and tweens will find it to be that appealing. With services like Webkinz and Club Penguin there is immediate gratification where as with KidZui, there is no underlying value other than the opportunity for the kid to surf around a site that has been approved for use by a subjective editor. So really, it's more of a filter than anything else designed to give the parent a sense of comfort that their child's Internet use will be based on family friendly fare. I just don't see it, may be I'm missing something, but I have hard time thinking this model will stick.