Static experience
Static electricity, the kind that makes clothes crackle, is produced when particles are rubbed off one object and left on another. Touching a machine called a Van de Graaff generator, which is specially designed to make static electricity. It is quite harmless, but can produce some hair-raising effects.

How the Van de Graaff generator works?
Charging up : The Van de Graaff generator makes static electricity by creating charged particles called ions. These are atoms that have extra electrons, which give them a negative charge. The negative ions are created on needles in the base of the generator, and are carried to the base of the generator, and are carried to the top by a rubber belt. They are collected by another set of needles, and transferred to a metal domes, which takes on their negative charge.
Lift of : When touches the dome, the negative ions spread into body, to the tips of hair. Each hair becomes negative, which means that it repels every other hair, and they all stand on end.

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