I used to put my ferret in a large mailbox I had in my room, blow him a fat bong rip, and then close the door and let him clam bake. When he had enough he'd flop the door open and just sit there all chink eyed being the calmest he'd ever been in his life.
Little fucker loved it. Anytime I'd get the bong out he'd run into his mailbox and just stare at me till it was his turn in the rotation.