World Record Domino Robot (100k dominoes in 24hrs)
From Mark Rober
14 min4th5th6thScienceTechnology
Summary
Mark builds a robot that sets up 100,000 dominoes to break a world record. The build is a study in designing a machine to do a precise, repetitive job reliably.
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Ages 7+
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Teaching resources
Discussion questions
Talk about it
Placing 100,000 dominoes by hand invites mistakes. A robot repeats the exact same precise motion, over and over, without tiring.
- Why is a robot well suited to placing thousands of dominoes?
- What has to go right for the whole chain to fall correctly?
- What problems do you think Mark had to fix during testing?
Quick work-a-long
Vocabulary: precision, repetition, reliable, design.
Try it: Set up a short domino chain. What one mistake breaks the whole run? Explain why precision matters.

