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Home » Science Experiments for Kids » Make a Rube Goldberg Machine

Make a Rube Goldberg Machine

Modified: Nov 1, 2022 · Published: Jul 20, 2018 by Emma Vanstone · This post may contain affiliate links · 4 Comments

Did you know that there’s a huge shortage of young people attracted to engineering jobs and a lack of diversity in the profession with the workforce being 88% male and 92% white?* I remember taking part in a special engineering event many years ago which was trying to encourage more women into the field, so it makes me quite sad that in the last 20 years the situation hasn’t changed much.

Engineering is a vast and exciting field that has been around for 1000s of years. This simple chain reaction is a great introduction to engineering and works well for a science club session, a science project or just for fun!

I’ve created a chain reaction STEM challenge template which you can find at the bottom of the page.

example chain reaction sTEM challenge template
Example Chain Reaction

Chain Reaction Challenge

What is a chain reaction?

A chain reaction is a sequence of events where one thing triggers another.

This is also an example of a Rube Goldberg machine.

What is a Rube Goldberg Machine?

Rube Goldberg machines use the principle of a chain reaction to achieve an end goal. The end goal in the case of our chain reaction is the popping of the balloon. Creating a machine like this is a great way for children to learn about cause and effect, conservation of energy and momentum.

Make a Rube Goldberg Machine – Step 1

The force of air from the fan starts off the chain reaction by knocking over dominoes. The first domino collides with the second knocking that over and so on until the ball is pushed down the ramp.

Chain Reaction challenge - a ball at the top of a plastic pipe to start the chain reaction

Make a Rube Goldberg Machine – Step 2

The ball is initially stationary until the force of the last dominoes forces it forwards and down the ramp. The downward slope of the ramp means the ball gains momentum as it travels.

A ball in front of a fan with a plastic tube in front for part of a chain reaction activity

Make a Rube Goldberg Machine – Step 3

The ball pushes a wooden car with a needle attached forward. This is an example of conservation of momentum. Momentum from the ball is transferred to the car, forcing it forwards.

Remember only moving objects have momentum.

A wooden toy car with a needle sellotaped to the top to pop a balloon as a final stage in a chain reaction

Make a Rube Goldberg Machine – Step 4

The needle bursts the balloon.

This part was a little tricky to get working. The first car we tried was too heavy for the ball to push forwards and the second was too small.

Experimenting with different objects actually made the process even more fun and the end result very rewarding.

a wooden toy car with a needle attached heading towards a balloon as part of a Rube Goldberg machine

We LOVED creating a chain reaction and can’t wait to design and build more.

More Chain Reaction Ideas

Go large! This outdoor huge chain reaction is great fun for the whole family.

Our craft stick chain reaction is fantastic, explosive fun for the whole family.

Or, try my easter egg chain reaction!

Make your own chain reaction

Try my chain reaction STEM challenge template to help plan your chain reaction.

Chain Reaction STEM Challenge Template

*Statistics correct at date of publication

Chain Reactions

Last Updated on November 1, 2022 by Emma Vanstone

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

  1. Creepers and Cupcakes

    August 07, 2018 at 9:04 am

    This is such a cute challenge! I would have definitely taken part part with my niece 🙂

    Reply
  2. Fatima

    August 08, 2018 at 10:59 pm

    What a fabulous idea! I will definitely keep this in mind so I can keep my son entertained when he turns 7.

    Reply
  3. bryanna skye

    August 10, 2018 at 3:14 am

    wow what a great initiative! teaching kids about science is so important and this makes it fun and engaging it sounds 🙂

    Reply
  4. WhatLauraLoves

    August 10, 2018 at 9:45 am

    I think that activities like this are great because they get everyone thinking! xxx

    Reply

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