Imagine you borrow $10 from a friend to buy a snack. Boom, you've got $10 more to spend, like magic money appeared! But, when you pay them back, that $10 vanishes from your pocket. Banks do the same but on a huge scale. They lend money, creating more cash in the economy. When loans are paid back, it's like that money disappears. So, money's a bit like Snapchat messages: here one moment, gone the next!

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