Cleo wandered into her mother's study on Saturday afternoon looking for her mom.

Her mother was counting some dollar bills.

Curious, Cleo asked her mother what they were.

Her mother smiled and said, 'These are called money.'

Cleo asked, 'What is money and where does it come from?'

Her mother replied, 'Money is something we use to buy things.'

She continued, 'Money has been used for thousands of years.'

Cleo listened attentively as her mother explained the history of money.

Her mother told her about trading and bartering in ancient times.

She showed Cleo pictures of coins, notes, and digital money.