As a long time volunteer at my local PBS station, I must emphatically state. Sesame Street is not a babysitter. These are educational programs designed to teach children while they are being engaged and entertained.
Mr. Rogers of Mr. Rogers Neighborhood was a Presbyterian minister and recognized back then that television was becoming too violent and fast paced for young minds. This is why you will see in his shows that they are very slow, meticulous and don't jump around. This is also the same concept that other PBS shows use in having a theme for the day and not changing and switching. Life shouldn't be so fast paced when you are three. Look at the other find shows that are available. Super Y, Word World, Science Kid. Your children are learning, turn on your captioning and turn down the sound and guess what--they are reading.
Now I will get of my Tide Box and join you is wishing Seasame Street, Big Bird, Oscar, Cookie, The Count, Kermit, and Piggy a very happy birthday, and many, many more.