Too much of one thing is never good for anyone. Cartoons are good treat for children but too much of it in my opinion will make them have less creativity. Why? For instance the ideas they get from watching cartoon versus going outside and doing an activity with other children. Kids have an imaginary mind of their own and when they play around they tend to think up all kinds of thoughts. While watching a cartoon the ideas are visually spoon fed to them instead of them thinking of it themselves.