Once he's securely locked inside, tie a rope about 10 feet long to the handle. Swing the taxi in a centrifugelike manner around you at high speed. For some real fun, try a vertical circle on a bridge over a river. This is, of course, quite realistic when it hits the water. Just dry a load of nice soft towels and then leave the door of the dryer open.
Front loaders are the best for viewing.
Kitties love small, dark, enclosed places to nap in, especially if it's warm. Just close the door and turn on the juice. The sounds are really wild. You get the picture. Be sure not to use good towels as kitty will very likely soil them.