My opinion on this isn't popular. One time I was discussing Sesame Street with a friend who said how great it was at teaching kids - his kid knew the alphabet when entering school.

I asked how often his kid watched SS. With a back of envelope calculation, I pointed out that it took SS several hundred hours to teach his kid the alphabet. I.e. it was the most inefficient, time-consuming teaching method ever devised.

(I was taught the alphabet in first grade by singing the alphabet song. This was before SS.)