This is a levitating machine.

A black 55 gallon steel drum and several 18 litre waterbottles that hang from the ceiling on stretch cords. A system of mutliple miniature pumps, manifold and a solenoid leak valve interconnects between the barrel and the bottles by transparent tubing. Solar panels mounted in the skylights overhead feed custom circuitry, dictating the operation and pacing of the pumps and valve.

The barrel is either levitating or lowering.

At its lowest point, the barrel is nearly full of water, and just rests on the ground. Levitation takes place as the pumps slowly sip away at the water gradually displacing it upwards into the bottles.

The pumps operate independently, each with it's own solar powered relaxation oscillator . The sipping is sporadic, according to sun conditions. The barrel is fully levitated at 3 feet above the ground. Depending on the weather, this could take anywhere from a day to a week.

When fully levitated, the pumps are disengaged, and the barrel is lowered by leaking. Gravity pushes the water from the bottles back into the barrel. The leak valve is also solar powered, and only opens when there is enough sun. Lowering can also take a long, long time.

The cycle repeats.

I like the idea of a system of small things working to eventually move a large object. This is how trees work: many small pumps act to slowly move water from the ground up to the top leaves of the tree. The tree moves many times its own weight in water over its lifetime.