Length 0:14
http://www.youtube.com/watch?v=8xcLJKeNFuk&feature=related
I thought your suggestion a dangerous idea, but here’s a guy wearing leather work gloves just to get the possum to growl. Nasty thing, I’d turn loose before it rounded on me too!
Rollo, a friend of mine used to do wildlife rescue. She was only allowed to take baby animals with low susceptibility to rabies, and opossums are in that group. She said the baby possums could become quite tame and looked fwd to contact with their human, though she tried not to let them get too attached so they could be released to the wild later. And that the stench of their poo surpasses that of kitties. If your daughter’s cat is up to date on her shots, she should be fine with whatever contact she’s had.
There may be a local wildlife rescue group near you...?