112 One million

This exhibit is a challenge that helps understanding of big numbers. After rotating the "1" wheel a couple of hundred thousend revolutions, the "1 mill" wheel  will tip off a flask from its shelf.  This will only happen a couple of times a year, and the wheel can be reset. Different sounds and lights are activated when some wheels have turned one revolution. A big numeric display indicates the actual number of revolutions, which also are approximately indicated by the black arrows.

Maintenance: No
Material: Aluminium, stainless steel. Shelf of wood. 
Colour: Natural
Wheel diameter: 28"
Display: Intense red 50 mm digits (not on photo above)