Let It Roll

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In this activity, learners will make their own "ball bearing" with two jar lids, marbles, and some household supplies. Ball bearings are important in rollerblades and other everyday items - how many can you think of? [Activity is publicly available through a web crawler capture on Archive.org. Activity write-up only, images are unavailable.]

Quick Guide

Preparation Time:
10 to 30 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$1 - $5 per student

Age Range:
Ages 6 - 11

Resource Type:


Materials List (per student)

  • Glue
  • Small pieces of modeling clay
  • A straw
  • Small beads (to fit inside the straw)
  • A piece of cardboard to mount your lid on
  • Approximately 7 marbles of the same size
  • 2 jar lids that fit together (one slightly bigger so that you can put one over the other)


  • Engineering and Technology
    • Engineering
    • Technology
  • Physical Sciences
    • Energy
      • Work and Machines
    • Motion and Forces
      • Machines
      • Momentum and Velocity


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


Access Rights:

  • Free access


Source Collection

  • TryScience