This object was made in Tinkercad https://www.tinkercad.com/things/77KeovbFBdk
The Hogwarts tower consists of fifteen parts.
Print everything once, only pins (03) print four times.
1) Mechanism - insert the vertical shaft (02) into the large gear (01), secure it with a split pin (03) and slide it from the bottom onto the mechanism holder (04). Put on the plate (05) from above and secure with a split pin (03).
2) Putting the mechanism into the tower - insert the mechanism into the grooves of the lower part of the tower (07) (the mechanism hole must be on the same side as the hole in the side of the tower).
Insert the horizontal shaft (08) (through the hole that is closer to the edge) into the handle (09) and secure with a split pin (03).
Apply the small gear (06) from the inside of the tower to the large gear (01) so that they fit together (they must fit into a hole in the side of the tower). Insert the shaft with the handle from the outside of the tower into the hole and secure it with a split pin (03) on the sideof the small gear (06). Put figures (10, 11, 12, 13) on the plate (05). Place the upper part of tower (14) on the lower part of the tower (07) and finally mount the roof (15).
And it is done. Each time you turn the crank, the character in the tower window changes. If you do not like the characters, you can create your own (pedestal has a diameter of 20 mm). If you want, you can put a mini LED candle in the middle of the plate.