TV on a Rolling Cart

A Stone Only Rolls Downhill

From OK Go Sandbox · 2025

A Stone Only Rolls Downhill
4 min3rd4th5th6thScienceSocial-Emotional Learning
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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

Our rating is a quick teacher-to-teacher guide — preview before showing.

Teaching resources

Discussion questions

Discussion

Sixty-four phones had to do exactly the right thing at exactly the right time.

  1. Why would filming on 64 phones need so much planning ahead of time?
  2. What do you think would happen if just one phone was in the wrong place?
  3. 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.