Trenton goes through periods of what he likes. For one month he may like to watch Brainy Baby dvds. The next month he may enjoy playing with play doh all the time. Then the next 2-4 weeks he may play his iPad all the time...so forth....and so forth.
His "thing" right now is his Baby Einstein dvds. His videos go everywhere with him.
He lines them up and watches the first few minutes. The video gets to a certain point and then we have to start it over.