He's a smart one

Me: You know what I think will be very interesting over the next three weeks?

Link: What?

Me: We've never had just a 4 1/2 year old before. When Hannah was 4 1/2 we had a baby to deal with as well.

Link: That's very true.

Jake: That was me.

Me: Yes, it was.

Jake: Do you know how I knowed that?

Me: How?

Jake (pointing at his head): Brain like a super computer.