Autumn.

Brady: Am I going to school today?
Mummy: No, not today, it's Saturday.
Brady: Is school out for summer?
Daddy: No, summer is over, it's Autumn now.
Mummy: Do you know what happens in Autumn?
Brady: Yes, the leaves go to yellow in Autumn.

We had this conversation with Brady at lunch today. His knowledge amazes us so much, Daddy & I both had tears in our eyes. How does he know these things???