Jokes aside

Aidan's been learning to tell knock knock jokes lately, and I could only supply the couple that I vaguely remember. For example:

Me: KNOCK KNOCK!
Aidan: Who's there?
Me: Lettuce!
Aidan: Lettuce who??
Me: Lettuce in, it's cold outside!

Then it's his turn to tell one.

Aidan: KNOCK KNOCK!
Me: Who's there?
Aidan: TRUCK!!
Me: (ooh, that's so cute!) Truck who??
Aidan: TRUCK IN, IT'S COLD OUTSIDE!!!

Hmm...methinks he's yet to get the hang of it...