Chain Reaction: Blockchain Simulator
Edit a record, see its hash change, and discover how linked blocks reveal changes. An interactive educational demo with no cryptocurrency, payments or real network.
Interactive apps
Hash Playground: Bitcoin Mining Simulator
Explore hashes, nonces and proof of work, then learn how Bitcoin transactions and blocks fit together. Educational simulation only: no real Bitcoin, wallets or rewards.
Million-Dollar Prize Ladder
Explore the original 1999 US prize levels, increases and guaranteed milestones.
Work Wi-Fi Next-Step Helper
Four choices produce cautious next steps and a copyable IT message.
Turn One Business Update into Social Media Posts
Create editable Facebook, LinkedIn, X and website news drafts from one business update. Free browser-only template tool.