SunDrum - The sound of sunlight falling on your ears! Linkage is a wooden spatula (or popsicle stick) with holes drilled in it, slightly larger than the dowel size. Small piece of dowel and tubing slices used to hold spatula to pulley, which has an eccentric hole drilled into it. Screw eye at pivot. Cork. Yogurt container.

  Pass the milk, please. 1/8" dowel running inside straws poked through container; film canister lids for wheels and driven pulley; elastic band drive-belt.

Rover - wooden blocks glued to solar panel, screw eyes as axle holders, dowel axles. Motor held by motor mounting clip.

  Mark Mateus' Solar House - a tracking device, playing with a simple design to make a whole house track the sun. House is mounted on a turntable. P.V. panels are wired to a single motor so that light exposure on one panel causes the motor to turn one way; and light exposure on the other causes it to turn the other way. When the panels are equally illuminated the house is at rest. When one cell is shaded, this arrangement will turn to seek the sun again until both panels are equally illuminated once more. Again, screw eyes hold the axle shafts, rubber tubing snippets keep the shaft from sliding sideways, elastic band is the drive belt from motor.

Solar Scarecrow 

Both shafts held onto post by screw eyes and rubber tubing retainers.

Europa Explorer by Natalie T.

Greg A's Solar Car.

H Huang's Drawing
Sam F's and Erin C's Solar Bat-car