1 pixel to 1mm scale Duck Hunt Laughing Dog Magnet. I designed this around 6x3mm circle magnets; specifically https://www.amazon.com/gp/product/B07KZQGWNN/ .
Feel free to tinker: https://www.tinkercad.com/things/jADBnaTc1J7-duck-hunt-laughing-dog-magnet
Disclaimer: This requires a printer that can print with 5 colors for full effect.
The author marked this model as their own original creation.