Place: just outside the school where our four year old (fyo) is studying.
He and I are on our way out, when he stops to show me what he coloured today in class.
Me: "Hey, that's a nice oval".
Fyo: "Ayyo, Appa, it's not an oval".
Me: "Oops, what *is* it?"
Fyo (proudly): "Don't you know? It's an ellipse!".