Divided Magnetic Pencil Box

School is starting back in my local area, and I was thinking of items that my kids need. This is a divided pencil box using 10x3 mm magnets (example https://www.amazon.com/dp/B09DYG7GLW the larger size). It uses 8 magnets, but you might be able to get away with just two corners. I like the extra seal due to it being used by kids. Loaded I was able to hold it upside down and the lid did not move. The kids could still open it pretty easily. 

Most of my pencils and pens fit well, but a few were too long. 

Supports are need on the box bottom for the magnet holders. Printed with 10%-15% infill. 

0.28 mm layer height with 0.4 nozzle.