One gathers what he 'sows', the other 'sews' what she gathers.
Riddles
What is the moon worth?
A dollar (because it has four quarters. )
Riddles
What is the difference between an oak tree and a tight shoe?
One makes acorns, the other makes corns ache.
Riddles
What is the biggest building in the world?
A library because it has the most stories.
Riddles