Free game · The Blockchain Gang
Stack the Chain
Help Molly the Miner add blocks to the blockchain, one block at a time. Tap to drop each block. Line it up and Molly confirms it. How high can you stack?
Tap, click or press space to drop a block. Use the in-game button for full screen. Open the game on its own page.
What kids learn
New blocks go on top of the chain, one at a time, and each one gets the next number. Your tower even starts at today's real Bitcoin block height.
Safe for kids
No accounts, no ads, no personal data. Scores stay on your device, and every link out of the game sits behind a grown-ups question.
Continue the story
Molly and her friends star in The Blockchain Gang: What is money?, a hardcover for ages 6–12.
Meet the Gang →