My isopods were all being really active and a little aggressive with each other today. I was really confused by it until I noticed one actively guarding a partial molted shell - and realized they'd cleaned out almost all of the eggshell I'd given them. Sprinkled in some more and they're instantly all calmly grazing on little calcium nuggets.
Also had a fun little interaction with one that happened to be hanging out near the top of the terrarium - it didn't run away when I lifted the lid, so I gently put my finger out towards it without actually touching it. It proceeded to sniff at me with its lil antennae, and I think investigate how edible my fingernail is. Didn't seem stressed by the interaction at all. It's cool to be able to non-intrusively interface with such a different creature than I am.