Three Colors of Light

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Have fun with additive mixing! Observe what happens when the three primary colors of light--red, green and blue--are mixed together, resulting in white light. This activity works best in a darkened room and requires adult supervision.

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
10 to 30 minutes

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

Age Range:
Ages 8 - 14

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per group of students)

  • Black garbage bag
  • Three plastic cups
  • Three plastic pipettes
  • Red glow stick
  • Green glow stick
  • Blue glow stick
  • Scissors
  • Plastic apron and / or gloves (optional)


  • Physical Sciences
    • Vibration and Waves
    • Light and Optics
      • Sunlight and Color
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations

Informal Categories

  • Toys


To use this activity, learners need to:

  • see
  • see color
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


This resource is part of:

Access Rights:

  • Free access