Push Me a Grape

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In this physics activity, learners experiment with the attractive and repulsive power of magnets. They move a grape using a Neodymium Magnet, and explore how the strong magnet repels the water in the grape using diamagnetic repulsion. This is truly a "Wow" moment for students, as the results are not what most people would expect.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
30 to 45 minutes

Estimated Materials Cost:
$5 - $10 per group of students

Age Range:
Ages 4 - 11

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per group of students)

  • Two Large Grapes
  • Drinking Straw
  • Film Canister w/ Lid
  • Pushpin
  • Small Knife or Razor Blade
  • Neodymium Magnet


  • Physical Sciences
    • Electricity and Magnetism
      • Electromagnetic Fields

Informal Categories

  • Food and Cooking


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


Includes alignment to state and/or national standards:

Access Rights:

  • Free access



  • All rights reserved, COSI Columbus, 2009