So many children's shows use this format, I wonder if it is making kids dumber or jaded. If they actually believe they are interacting, they are probably too young to do the requested action. If they can do the actions they should know that they are not affecting the video, and the thanking/praise/tips are not genuine (it does not help that many phrase it in a way if you heard it in person is clearly insincere). It is one thing to indicate this is the start of trying to figure something out or sing along then transitioning to something else, but it really does not have to be done the way so many do.