A mobile has mobile elements made from a solar cell, a hollow beam and a motivator.
The solar cell is mounted to a substrate and connected via wires through the hollow
beam to the motivator. The hollow beam supports the substrate at one end and the
motivator at the other. The motivator may be a small electric fan or valved gas
jet. The substrate is a flat plastic panel, such as a CD-ROM disc, a lightweight
plastic sheet, and printed circuit board. The mobile elements may be connected
as in a traditional Calder mobile, or in an aligned vertical stack. As the solar
panels receive sufficient light, power for the motivator is generated, causing
the mobile elements to move.
