Many children watch YouTube for different reasons. If they arewatching something inappropriate, then you should block the app, ortake away what they use for YouTube. If they do virtual things,limit that time.Make cutbacks on what the children enjoy. Now, I'm not sayingtake it away forever, but maybe for a week or 5 days. Most childrencan't live without devices, sadly. YouTube is blockinginappropriate things, and you have to sign in to prove you are over21, but it doesn't block all inappropriate things.