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.
Step 1: Gather your materials.
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.
Step 2: Making the Rotor.
The spinning part of any motor is called the rotor (because it rotates).
Cut three pieces of foil. The exact dimensions for the basic motor are not important, but they need to be slightly shorter than the cup is tall, and of a width so that there is a gap of about 1cm between the pieces when you stick them to the cup.
Stick the pieces of foil to the cup. Space them evenly around the cup, and make sure there is no point where neighbouring pieces touch each other.
(I say "three pieces of foil", but the exact number seems unimportant - maybe somebody would like to research this point - as long as it is two or more.)
Step 3: Making the Base and Adding the Rotor.
Sharpen the bamboo or dowel to a reasonable point, and then use the blu-tac to stand it in the middle of the base-board. Balance the cup (upside-down) on the bamboo so that it spins freely.
It is possible to sharpen the dowel with a pencil sharpener, or even use a sharp pencil instead of the dowel. Bamboo usually needs a sharp knife.