A hand-cranked Christmas street. Turn one red knob and everything on it moves.
Santa's cottage, a penguin slide and a skating pond, each on its own snowy lot, with the North Pole tower closing the street on the right.
Turn the red knob on the side of the North Pole tower, about once a second. Turn it backwards and it only clicks: the street runs one way.
Behind the tower's windows a 30-tooth gear drives a 14-tooth idler and an 18-tooth gear, so the shaft below spins 1.67 times for every turn of your hand.
The shaft runs through every lot. On each one a 12-tooth gear turns a 36-tooth crown, and the crown turns the building above once for every 1.8 turns of the knob. If a building jams, its crown slips with a click and the rest of the street keeps going.
A cam under the cottage roof lifts Santa out of the chimney, turning him a quarter turn to look down the street. Then it lets go, and he drops back in with a clack.
Fins inside the ice tower push the penguins up a spiral track, past the window. At the top they roll out down a chute, zig-zag down 3 ice ramps into the pool, and ride up again.
The Christmas tree turns in the middle of the ice. Its ribbon arms pull 2 skaters round an oval groove in the ice.
Every building sits on its own lot, and lots push together end to end. A lot added to the street is turned by the same crank, up to 8 lots long.
Every building sits on its own white lot, and the lots butt together into one long snowy street with the North Pole tower at its end.
Jingle Street is 3 lots and the North Pole tower. Each lot carries its own piece of the shaft, joined to the next by a dog coupling, so a building on any lot is driven by the same knob.
The crank is made to turn up to 8 lots. Every building takes its own share of the turn, and a stuck one slips on its own instead of stopping the street.