Twittering in the park

I'm not taking about the birds twittering, but rather one of the playschool presenters. The program Playschool is aimed at pre-preps, so mainly 4-year-olds. I wonder how many 4-year olds actually know what twitter is. My guess is that most of the children watching had no idea what he was pretending to do, I know my 6-year old was clueless (who was only watching with his younger brother because of the school holidays). Scenario went something like this; Presenter got an sms on his cardboard pretend-cellphone about meeting the other presenter in the park. He goes to the pretend park, she's not there yet and he says: "what can I do while waiting for [other presenter]? Oh, I know, I can twitter about my day in the park, everyone is always interested in my twitter", at which time he starts pretend-writing about his planned day in the park. Hmm... I can think of other things one can do while waiting around in a park, PLAY quickly comes to mind... considering the age of the ones hearing the question.