The question is how to achieve that? In today's world and as a father myself, I can tell you that it's practically impossible to control or even keep an eye on your children 24/7. Kids, if they are not out with their friends, they will stay in their rooms with phones/tablets/PCs and open access to the internet or watching TVs with all sorts of ads. How can you protect them from all this and limit their exposure to ads and content which is not suitable for their age?