Both of our ferrets will play with the toilet brush, too.  Especially Bongo.
Whenever she gets hold of it, she goes ballistic.  She drags it at top speed
all over the house, dooking, hissing, and war dancing (not an easy task with
a toilet brush in your mouth).  Then she'll roll on it, get up, dance, and
roll some more.  Mind you, we try to discourage this, since a toilet brush
is hardly germ-free, but she's crafty, and will wait for days for an
opportunity.  Yet another ferret quirk!
 
Tanya
[Posted in FML issue 1816]