While I can understand where the question is coming from? This is not the first time that I have run into this. My children have only seen television on annual visits to my parents house. We have never owned one. When my daughter (now in fourth grade) was in public school kindergarten, they had weeks based on letters of the alphabet. For 'G' week, the teacher gave them a coloring sheet of Grover from Sesame Street, playing the guitar. My daughter colored Grover red, because the only thing she had ever seen that resembled him was a toy Elmo at her friend's house.
The teacher gave her a 'sad face' because Grover was not blue.

I have been homeschooling her and her siblings for the last 4 years now for so many reasons, but this is definitely included on the list.