A Stone Only Rolls Downhill
From OK Go Sandbox · 2025
4 min3rd4th5th6thScienceSocial-Emotional Learning
Summary
This video was filmed on 64 mobile phones running at once, each capturing a piece of a giant coordinated picture that only comes together when all the screens combine. Pulling it off took careful planning, timing, and teamwork — the anchor for the Sandbox's 'A Good Plan' lesson on managing a big project.
Viewer safety
All ages
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Teaching resources
Discussion questions
Discussion
Sixty-four phones had to do exactly the right thing at exactly the right time.
- Why would filming on 64 phones need so much planning ahead of time?
- What do you think would happen if just one phone was in the wrong place?
- When have you had to plan the steps of a big project with other people?
Quick work-a-long
Vocabulary: plan, coordinate, sequence, teamwork.
Try it: Pick a big task (a class play, a mural). List the first five steps in order and say who would do each one.

