What are smart contracts?

Smart contracts are like rules written on paper that help people do things automatically without needing someone to watch over them.

Imagine you and your friend want to trade toys at recess. You both agree: if you give your friend a red car, then they’ll give you a blue truck. That’s a smart contract, it’s like the rule that makes sure everyone follows through on their promise.

Think of a special kind of piggy bank. You and your friend each put a toy inside. When the bell rings (which means the trade happens), the piggy bank opens, and both of you get what you wanted, no need for anyone to check if you kept your promise.

Smart contracts are used all over the place, even by grown-ups. For example, when you rent a video game online, the smart contract might say: if you pay $5, then you get to play the game right away, and that happens automatically!

So smart contracts help people do fair trades without needing someone else to keep things running. It's like having a rule that works by itself, just like your toy trade!