An Orrery in whch the planets are represented not by spheres on posts but by a carefully chosen selection of variously sized screwdrivers.

The "Sun" can be unclipped and opened to permit use as a standalone task light.

For a touch of delicious recursiveness, the orrery can be comletely disassembled and reassembled using only the screwdrivers that are a part of it.
-- 8th of 7, Mar 12 2015

random, halfbakery