This is a replacement knob for a lamp, in the shape of a windup key.
Not only does it look cool, but it makes the knob easier to turn! You can even
turn it with the key in-between your fingers; very little dexterity is required.

Print with a high infill ratio; I used 100%.
Cut threads in the hole using a self taping screw if necessary. Although, on some lamps the knob can be screwed on with no modification.
It might be interesting to print in wood, or glow in the dark plastic...
Please upload a picture of your creation, especially if it glows in the dark ;)