Child-Safe Shower Drain Cover

There are lots of shower drain cover designs out there. However, many years ago, my then little daughter managed to get her finger stuck in a steel one (as you see in the first photo). Even the fire department couldn't free her because the steel was too hard to cut and a burr made it impossible to ease her trapped finger out even with ice and lubrication. It took a trip to the emergency room to get her cut free.

Way back then, I didn't have a 3D printer and instead hacked a plastic part to so