Normal motors are driven by electromagnetic forces. This motor needs no batteries, mains supply or solar cells. Electrostatic motors are turned by the kind of electricity generated by wearing nylon clothes in a modern office. Think of it as gigantic nano-technology as well, because this is how the microscopic motors of nanobots work.
For the basic motor, you need a disposable plastic drinking cup, aluminium foil, glue-stick, bamboo or dowel (at least a centimetre or two longer than the cup is tall), wire and a non-conducting base, such as a plastic plate or a wooden board.