Lots of things, but primarily they'll explore, play fight, try to find spots to dig, and chase you or any other animals in the house. Ferrets need quite a lot of stimulation to keep them from getting bored. (An easy way to tell if they're bored is to watch for them to lay flat on their bellies and stare at you.)
Ferrets are only bred with other ferrets
The collective term for a group of ferrets is a "a business of ferrets" or "a cast of ferrets".
Panda ferrets the same as other ferrets, just the coloring is different.
Ferrets do have a ribcage
Ferrets do not hibernate.
The plural for ferret is ferrets but a group of ferrets is called a "business" of ferrets.
Wild ferrets - European polecat ferrets live in Europe. Black Footed ferrets live in North America.
Ferrets are not dangerous at all
Ferrets are terrestrial
Yes you can get ferrets in the UK
everyone like ferrets
Ferrets are in the weasel family