A serendipitous example.

While working on this column, Hila (as of this writing, three months away from turning five) brought me the comic from a piece of Bazooka bubble gum and asked me to read it to her. It was right on target:

Teacher: Guy, what do you call someone who continues to talk even when others aren't interested in hearing him?
Guy: um... um...
Joe (jumping up from the back the the classroom): A teacher!

Go to: So? What's new about that?, or
Go to: What's a nice constructivist like you doing in a site like this?