Great advice so far. Just wanted to add that they could be tapioca, rice, or a combo. I haven't had good luck frying them, but think I had my heat too low. I keep meaning to try again.
I only put one in a pan of warm water at a time - never several (or I have a mess). I usually just put it in the water until it just starts to soften (no longer than 30 seconds, probably less), then I put it on a sheet of waxed paper and let it sit for a few minutes. They will take longer to reconstitute, but they won't get overwet and fall apart as they can if you leave them in the water for minutes. If too wet, they will tear as you try to roll them. I've found that everything in them rolls better if there are no 'sharp' edges, so to say. Carrots, even mint stems, can poke through easily.