It's interesting you guys talking about hermit crabs. Our neighbor in Uni. housing had them when we first got married. He used to bring them outside sometimes. He was older & kinda shy so we didn't learn much about them but they seemed pretty cool.
The serious (crazy? LOL) keepers don't recommend handling them unless you have to move them, etc. There's always exceptions to the "rules" though. Check this hermit crab video out: