Need to revisit the the previous class? New to our classes and want to see more resources?
Let's build a secret code machine! You can make your cardboard invention look however you would like! Our cardboard machine mimics an old school typewriter. (Have you ever seen one?)
To get started, grab some cardboard, some heavy duty scissors, paperclips, and brass fasteners.
Maker Tip: Sometimes you might prefer coding your project and then making it. If that's you, skip down to the coding step and come back to this step after you've written your code.
In this cardboard build, we are going to share three of our favorite cardboard techniques!
- Scoring cardboard to make angles
- Creating curves with cardboard
- Using binder clips and hot glue to add support
Scoring Cardboard
To score cardboard, use scissors or a handy tool like this Canary Cardboard Cutter. Make sure to cut only halfway through the cardboard. Then you can fold and create great angles with your cardboard!

Curving Cardboard
Create a smooth bend in your cardboard by bending it on the back of a chair. Press over chair and ease your cardboard into a nice curvy shape!

We love this tip from maker educator Erin Riley! Head to her site, if you want even more cardboard techniques!
Using Binder Clips to Hold Shapes
You can form your cardboard and either hot glue shapes together or use binder clips to hold shapes in place. After you use hot glue on cardboard, binder clips are a great way to temporarily hold pieces together until the glue dries.
Pro Tip: If you don't want to use hot glue, Tacky Glue is a great glue for holding cardboard together!
Check out this Full Video of Cardboard Build
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