I ran across these fabulous tropical Bocacaui Seeds (Sea Beans) the other day while I was in town! They have the most interesting pattern and texture to them and most of them are the size of a quarter and feel like pebbles.
They're purely for decorative use but apparently you can drop essential oils onto them for a lovely aroma therapy effect while you enjoy looking at them *grin*. I'm not sure though if I can just leave them to sit. I have a couple of ideas up my sleeves as to how I can use them, but for now I've got them on my desk and I can't keep my hands out of the bowl! LOL.