One of my kittens, Robin, loves hanging around in the bathroom with me whenever I'm in there. (which is fairly often due to my tiny bladder) Normally I wouldn't mind, but he always insists on going up behind me, so he bumps up against the little drawer we have sitting on top of the toilet.
He's knocked the entire thing down twice now, smashing both of the small drawers to bits. Not to mention all of the times he's knocked down our lotions/skin care products, which have fallen straight into the toilet half of the time. >_>
Otherwise, the kittens just do the usual kitten stuff; knock things off the counters, rip up paper bags while I'm trying to put away the groceries, etc.