Imagine you have a big box of crayons. All the crayons are the same size and color, and you can trade one crayon for another with your friends. ERC-20 is like a set of rules that makes sure all the crayons in this box are the same and can be shared easily.

ERC-20 is a special rulebook that people use to make tokens on the Ethereum playground, which is like a big computer where everyone can play and trade safely. Tokens are like little digital coins or points you can use to buy things or play games.

Just like when you play a game and everyone agrees on the rules so it’s fair, ERC-20 makes sure all these tokens can work well together. That means a token from one game or app can be traded in another. Everyone knows what to expect when they use these tokens.

The ERC-20 rulebook tells the tokens how to do six important things:

• Counting how many tokens there are in total, like counting all the crayons in the box.

• Checking how many tokens you have.

• Sending tokens to your friends.

• Allowing your friend to use some of your tokens (with your permission).

• Keeping track of how many tokens your friend can use.

• Letting your tokens talk to each other nicely so everything works smoothly.

Thanks to ERC-20, tokens can be used in many apps, making the digital world more fun and connected!

Imagine if you had special marbles that follow certain rules so everyone can trade and play with them fairly. ERC-20 tokens are just like those marbles in the Ethereum playground, letting you trade and share in a safe and fun way.