When this show came on the scene in Britain in the mid 1990's critics were concerned about the show's target audience since its aimed for children two and under. Eventually PBS picked it up for the American audience and it's been with us ever since.
The show specializes in simple stories, poetry, visuals, dance, and the observation of children in the real world (via the pinwheel shaped windmill transmitting those pictures of children to the Teletubbies on their stomachs).
While the Teletubbies are the equalvent of a one year old (the way they speak is a classic example of it), they seem to have their favorite things. Tinky Winky has his red bag (some think he is Gay icon because of this but its up for debate), Dispy likes his black and white hat, Laa-Laa has her Orange ball that look like a balloon, and Poe has her blue scooter. They each have a special song is they go around their play area called Teletubby Land, but they all love spreading love to each other with their "Big Hugs."
The show also makes use of repetition frequently. Usually when the Teletubbies beg to see, hear, or act something out again, whatever it is. This gives the children to soak something in better the second time it's played out. In the recent shows produced the show begins with a segment called "Teletubbies Everywhere" were the use of a video wall is used and video tricks are used such as duplicated Laa Laa's or whatever.
The Voice Trumpets (which look like Periscopes or upside Golf clubs) seem the govern the Teletubbies. They tell its time for the show, and when to say goodbye. They also sing simple song, and tell simple poems. They can pop up anywhere in Teletubby Land even inside the house they live in.
Teletubbies has proven to be a hit worldwide, and regardless whether or not this should ever gone on the air in the first place or if children's TV is being dumbed down. It could be worse, their is that six foot purple thing. Makes you think twice about bashing the Teletubbies.