Often I like to add a little flavor to my campaigns, as well as a little mystery to my players’ lives, by including in treasure troves or other tantalizing places certain little “found” items. Very often these items look like trash or useless little bits of flotsam on an NPC’s desk. Usually they are exactly that. But when you’re operating in a sandbox environment, it is sometimes amazing what these items will turn into, either on your own inspiration or your players’.
I have had players carry some of these little bits and pieces, just a random entry on their character sheet, for weeks and months (and on one occasion, a year) until one session they look up and say, “This little bag of fingernails.... Is it possible that it belonged to NPC X?” or “Is it possible to do Z with it?” and suddenly an entirely new window of the game opens up and you have a new adventure hook.
In one instance a player carried around a small bag filled with little bells. The character used these one night, spreading them across the floor of a cavern as an alarm so that they group could rest. The wandering monster entered the cavern, stepped on the bells which immediately jingled, the party awoke, and melee ensued.
Another option is to use them as Evil DM Fodder. In other words, they're completely useless items. However, if you plan correctly and present them in
just the right way it's possible to convince your players that these little bits of detritus actually have value. Take advantage of the player mindset that says, "Everything the DM does, says, or gives us has a purpose." Take that mindset and run with it. You'll have the players thinking that the lump of dried cow dung they found has mystical properties when it was nothing more than part of an NPC's tinder box.
Hey, DMs are allowed to have fun too.
So, for your DMing pleasure and enjoyment, I present the following tables: