I just started a bin of the orange colorform of Porcellio scaber which are sowbugs, these just freeze in place or play "dead" if disturbed, even allowing themselves to be poked and prodded. Then after I've decided "yup it's dead" it jumps up and takes off like a shot under some leaf litter or egg carton:
They're neat little crustaceans, fun to watch. Very active and inquisitive. I will be using the main colony to seed my new vivariums then I will try to offer some starter groups up for trade later in the year.
I wish I could have some of the giant deep sea Isopods like these :
Bathynomus giganteus
they go from 7" to 30" in size and eat dead whales on the sea floor! So should be easy to keep... LOL