Rube Goldberg Machine
Teams design a chain-reaction machine using household materials to complete a simple task.
Learning objectives
- Understand the concept of a chain reaction and cause-and-effect
- Apply simple machines concepts (ramps, levers, pulleys) in a design
- Collaborate as a team to plan, build, and troubleshoot
- Communicate the design process and results to the class
Step-by-step instructions
- 1
Watch and wonder
Show a short video of a Rube Goldberg machine. Ask: What do you notice? How many steps did it take? What was the final task?
- 2
Define the task
Each team's machine must complete a simple task: knock over a cup, ring a bell, or drop a ball into a container. Teams choose their task and write it on their planning sheet.
- 3
Plan your machine
Teams sketch a diagram showing at least 4 steps in their chain reaction. They label each step and the materials needed. Allow 15 minutes for planning.
- 4
Build and test
Teams build their machine and test each step individually before connecting them. Encourage iteration — if a step doesn't work, adjust and try again. Allow 40 minutes.
- 5
Full run and showcase
Each team demonstrates their complete machine for the class. Celebrate every attempt — partial success counts! Discuss what worked, what didn't, and what they'd change.
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