jarring possibilities

I’m working on a small quilts series of things in jars.  I was initially thinking canned goods: pickles, beets, pears..., but I’ve quickly run out of typical can-ables (no relation to cannibals) and am tapping my thought box for more.  I’ve got sprouting avocado seed, bathing beauty, bolts and screws,  and lightening bugs thus far.  Any other ideas for jarring possibilities?