3X Hand Stirling

Stock price, minimum 3pcs
This Stirling engine is a beautiful conversation piece for your home or office or a great physics or chemistry demo for your classroom or lab.
It will run indefinitely on your warm hands in a 72 degree F (23 degree C) room or on a computer monitor, TV, DVD player, VCR, stereo amplifier/receiver or fax machine. It will even run on bright sunlight shining through a window.
While this revolutionary Stirling Engine operates based on well understood physics, it may be the closest thing to magic and a perpetual motion machine you can buy anywhere at any price.
It only requires that the base plate be 10 degrees F (8 degrees C) warmer or cooler than the top plate for it to run continuously. Amaze your friends, your family, your co-workers, or just yourself!