- Your initial age/sex question should probably be on a landing page geared toward parents who are bringing their kids to the webpage. On this landing page, you should include information about what the site is for and why a parent might appreciate the content there.
- If this isn't really intended for kids to interact with, maybe you should consider providing a "kid-friendly" version where they can navigate and explore the content on their own. There are few decent solutions which let kids "learn" to use the internet inside a sandbox.
Overall, I think this site is great! Sent a link to my better half to use with our toddlers. ;)
We had a landing page but we were losing a lot of people on it. Switch testing made it clear that more people preferred the current layout where the age/interest selection is optional.
We'll go over your comment again and weigh each one in. Thanks again!