We've extended this challenge by two weeks! Get your projects in by June 6th, 2022.

For this contest, we want to see science-based projects and experiments! Document a classic science fair experiment or try something new - as long as you explain the science behind the project, it's eligible.

Share your best science project for a chance to win a $300 gift card!

The Science Fair Challenge is closed.

Grand Prize

19 Prizes

Grand Przie

One Grand Prize Winner will receive:

First Prize

Three First Prize Winners will receive:

Second Prize

Five Second Prize Winners will receive:

Runner Up Prize

Ten Runner Up Winners will receive:

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 Apr 25, 2022 and Jun 6, 2022 (11:59pm PT).


Upon publishing your Instructable you'll see checkboxes for open contests. Select Science Fair 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.