Half their business is propaganda (the other half being surveillance); of course they represent themselves as something positive. Recognize them for what they are. Point it out to others. Advocate for banning them in schools. Warn parents that youtube kids is not appropriate for children. They do near zero curation. They don't commission creation of educational content. They are nothing like PBS (as another commenter compared them to). More generally, ads are not child appropriate. These platforms have some useful content, but on the whole they undermine teaching virtues, and in fact their entire purpose is to push the opposite.