If your kids like our lunchbox kits, they will love these silly knock-knock jokes:

Knock, knock.
Who's there?
Little Old Lady.
Little Old Lady, who?
I didn't know you could yodel!

Knock, knock.
Who's there?
C-2.
C-2, who?
C-2 it that you don't forget my name again.

Knock, knock.
Who's there?
Arthur.
Arthur, who?
Arthur any treats for me?

Knock, knock.
who's there?
Hatch.
Hatch, who?
Bless you!

Knock, knock.
Who's there?
Ash.
Ash, who?
That's your second sneeze. Do you have a cold?