18months old is watching nursery rhymes on cellfone evryday.. what is the bad effect of it to her if there is any?

Human development: At 18 months of age, a baby is learning about her world, by walking, running, touching and smelling, as well as interacting with humans and other animals. All of that interaction is lost when interacting with a screen. Learning to interact with your environment is most important and time spent interacting with a phone is taking time away from this continuous learning experience.