Imagine you have a special notebook that keeps a record of all the games you play with your friends. Instead of just one person writing in the notebook, everyone in your group writes down what games were played and who won.
Now, here's the cool part: once something is written in the notebook, it can't be changed or erased. So, if someone tries to cheat and say they won a game they didn't, all their friends would know because the records in the notebook wouldn't match what really happened.
That's a bit like how blockchain works! It's like a digital notebook where lots of people can write down things that happen, but once something is written, it stays there forever. This helps everyone trust the information because it can't be changed later without everyone knowing. So, just like your notebook keeps track of games honestly, blockchain keeps track of information on the internet in a super honest way!