Explaining Blockchain to a 5-Year-Old — using Legos

Photo by Daniel K Cheung on Unsplash

Hi there! Today, I’m going to tell you all about something called blockchain.

Imagine you have a big box of Legos, and you want to build something really cool. You start putting the blocks together, one by one, until you have a big tower. But what if you want to make sure no one else can take your tower apart and steal your Legos? That’s where blockchain comes in!

Photo by Glen Carrie on Unsplash

Blockchain is like a special kind of Lego tower that no one can take apart without your permission. Instead of just one tower, though, it’s more like a whole bunch of towers connected together. Each tower is called a block, and they’re all linked together in a chain.

Now, here’s the really cool part: once a block is added to the chain, it can’t be changed. That means no one can sneak in and steal your Legos, because the tower they’re attached to is completely secure.

So how does blockchain work?

Well, every time someone wants to add a block to the chain, they have to solve a puzzle. It’s like trying to figure out a really tricky riddle. Once they solve the puzzle, they get to add their block to the chain, and everyone else can…