Cardboard is a perfect material for making things: it's all around us, relatively easy to work with, and often available for free. 

Any project that incorporates cardboard will be eligible to enter this challenge, and winning authors could take home a great prize such as a Traxxas Slash 4x4 RC Truck, Anki Cozmo Toy Robot, or a Swiss Army Knife. 

It's time to break out of the box and make something amazing with cardboard!

The Cardboard Challenge is closed.

Grand Prize

19 Prizes

Grand Prize (1)

One Grand Prize Winner will receive:

First Prize (3)

Three First Prize Winners will receive:

Second Prize (5)

Five Second Prize Winners will receive:

Runner Up (10)

Ten Runner Up Winners will receive:
  • An Instructables Prize Pack
How It Works

Write an Instructable

Create a new Instructable that fits the guidelines outlined in the contest description above. To be eligible, Instructables must be published between Jan 7, 2019 and Feb 4, 2019 (11:59pm PT).


Upon publishing your Instructable you'll see checkboxes for open contests. Select Cardboard Challenge. If you have entries currently eligible for entry, it will also show up by clicking "Enter this Contest" on the right side of this page.


Entries are accepted by Instructables staff within one business day Monday - Friday. What matters is the submission time, not acceptance time.


A panel of judges made up of Instructables staff and respected members of the community rate the finalists. The averages of the ratings determine the winners.


When the winners are decided they will be notified and announced here on the contest page.