I do a lot of engraving work for my various art projects. Over the years I've amassed quite a collection of burrs and cutters. Some came in fancy sets in padded cases, but a lot of them were single purchases individually wrapped in a clamshell pack or bag that, once opened, can't really be resealed. This makes for a lot of loose burrs rattling around, potentially getting dulled and/or damaged.
So I made some new burr cases
Time: Some Skill: A little.
Could easily be adapted to make cases for any number of small knickknacks.