One subject, every age — climb the ladder from first steps to professional depth.
Imagine your whole class shares one special notebook. Every time something important happens — Sara lends Omar a pencil, the class earns ten stars for cleaning up — someone writes it on a page.
Strip away the hype and a blockchain is one idea: a shared record that no single person controls, and that is extremely hard to rewrite. Everything else — Bitcoin, NFTs, Web3, tokenized real estate in Dubai — is built on that one idea.
A blockchain is an append-only distributed database with an unusual property: participants who do not trust each other can nonetheless agree on its contents. Every serious application — and every serious limitation — follows from how that p