Light Combinations

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In this activity about magnetism (page 17 of the pdf), learners experiment with magnets, exploring the concept of diamagnetic materials by seeing how a grape reacts to a magnetic field. This is a great activity to show how sometimes, in science, you can get very unexpected results.

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$1 - $5 per group of students

Age Range:
Ages 6 - 11

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per group of students)

  • Two Large Grapes
  • Drinking Straw with a small hole in the center 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:

This resource is part of:

Access Rights:

  • Free access



  • All rights reserved, COSI Columbus, 2009