When I see shows like that, you can sometimes see it. Sometimes its pretty subtle, sometimes its not.
The irony is, Dora is a Tomboy! Nevertheless, they do have Diego to hold up the boy side. Without telling stories, let me just say that my grandfatherly experience tells me that gender identification is an issue for the under five set, especially for the boys, because they tend to live in a woman’s world at that age. I see it in the form of seeking reassurance for their masculine identity.
And of course, at that age they are very, very suggestible. You can say you understand it, but example by example, it is always startling.