≤ 40 × 40 MM
Postage PCB
beep boop beep click clack
- THE LIMIT
- Make a PCB that fits within a 40x40mm square, that actually does something.
- THE PRIZE
- Up to $25 toward fabrication and parts for approved projects.
You ship a website that's under 512KB,
we ship you a custom Hack Club patch.
Then, ship for another challenge to earn more amazing prizes, like a Nintendo Game Boy!
Make a tiny website to get familiar with the challenge.
Ship a website where every page's size is under 512 KB.
Try avoiding raster (.png) images in favor of vector (.svg) images instead. Large font imports can take up anywhere from 50MB to 500MB, and so can JavaScript bundles!

The prize is a custom embroidered Hack Club patch!
Start this challengeAfter the Website, each Mini challenge sets one measurable limit. Limits cover file size, board size, screen size, character count, or time.
Pick bytes, millimeters, pixels, characters, or seconds.
Make a complete, original project within the chosen limit.
Submit your project, and we'll ship you a prize :)
Challenge Projects must take a minimum of 5 hours of work, tracked via Hackatime or Lapse
After you complete the first challenge,
complete one more or complete them all.
≤ 40 × 40 MM
beep boop beep click clack
≤ 60 SEC
You can scroll one reel... maybe two...
32 × 32 PX
Let me OUT OF HERE-
1 FILE
Just how Claude intended.
≤ 100 LINES
Hole in One!
This could be yours!PRIZES
Every challenge you complete gets you a prize, but if enough projects are submitted, the best projects will earn either a authentic Game Boy Color or Game Boy Advance!
FINISHED YOUR PROJECT?
Open worldwide to teens ages 13 to 18. No experience required.
Teens ages 13 to 18 (inclusive), in high school, from any country and at any skill level.
Join the Hack Club Slack, and ask for help in the #mini-ysws channel!
Hack Club is a 501(c)3 non-profit organization (really, it's the people), and we've run a bunch of events like this in the past. For example, we ran a 180-person hardware hackathon at GitHub HQ, and a seven-day game jam in Shanghai, China.