These little tags look great on a keyring .Print them out, sell them to friends and family (and anyone else in selling range) and then give the money to charity.

For preference you could give your cash to the Red Nose Day appeal in the UK, but I really don't mind. There are lots of good causes out there. If you print some tags out for your own use you are honour bound to give some money to charity somewhere. Tags have holes that you can use to add them to your keychain as a permanent reminder of how generous you have been.

Every tag is different. They have been created by a Python program running inside FreeCAD. I've uploaded four sets of sixteen tags. If you want your own completely unique set you can message me and I'll send you an STL file.

Each tag has a particular number of circles and squares on the top, and some on the bottom two. You can use this in silly games if you like, pitching two tags against each other and using the hidden power of the extra square (or circle) underneath to beat your opponent.

The rules for the Battle Tags game and the tag design files are here. Battle Tags is a multi-player game where you use your skill and bluffing abilities to gain victory. Each player needs a set of the Battle Tags design (best if they are different colours).