Complexity combined with elegance: The Aero Clock is one of the most sophisticated and ingenious model making kits. The assembled wooden clock kit is driven by the force of gravity pulling on a bag you fill with sand or salt.
this clock is very hard to do and would not recommend to anyone under 12 as you need to have quite soft touch in places but as always it was fun to do not set it up keeping time just yet as need to find some were to hang it first