Skittle Diffusion Experiment

Skittles, a plate and warm water are all this diffusion experiment needs: students arrange the sweets in a circle, pour water in the middle and watch the colours spread towards the centre.
Year groups
Years 3–9 (Key Stages 2–3)
Pages
1
File type
PDF
Preparation
Print ready

Updated Oct 19, 2026

Subject
Chemistry, Science
Topic
Skittle Diffusion Experiment, Diffusion Experiment
Resource types
Activities
Preparation
Print ready

From the author

About this resource

Activity Introduction

An amazing activity designed for the students to learn more about STEM.

Skittle Diffusion

Do you like STEM subjects? what is your favourite one?

Have you ever tried to plant a seed? If yes, tell us more about it.

Or have you ever tried to invent something? If yes, tell us more about it. And how do you think it will help us?

Have you ever seen a microorganism under a microscope? What was it? And how it looked like?

Mathematics is a marvellous subject. Let's sharpen our brains and solve some equations.

Do you like timetable tricks? What is your favourite one?

Do you know how to code? Have you ever created an app or a game before? If yes, how was it like?

Skittle Diffusion Activity

The activity is perfect for encouraging the researching skills for the students, while learning more about this fantastic topic.

Skittle Diffusion

This friendly designed worksheet is suitable for students at school, homeschooling, and as a group activity.

Instructions

  • Arrange the skittles in a circle around the outer curve of the plate.

  • Carefully pour warm water into the middle of the plate, so that the skittles are half submerged.

  • Watch the colour of the skittles slowly start to creep towards the middle of the plate making a rainbow!

Format

Available in a PDF format.

In the classroom

Teaching tips & learning objectives

Learning objectives

  • Observe diffusion as the colour from the sweets spreads through water

  • Explain the observed colour movement in terms of diffusion

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