Cassy rarely will wander off with the feather duster, but a brisk game of 'dusty tummy'* delights him.

* Human holds feather duster and asks, "Is that a Dusty Tummy I see?" Human then dusts the feather duster along the D.T. in question. Human frantically tries to save human fingers from claws of death grappling with the f.d. Repeat as long as human nerves last. {Yeah, like you don't have silly games you play with your cats! Ha!!!}