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this experiment is best done on a dry cold day, not on a moist day. take a balloon and
inflate it and tie a knot. now if you bring it near your head, it does not attract the
hair at all. now you rub the balloon on your head and knock off some of the electrons.
the balloon gets electrically charged and now it will attract the hair. your hair will
stand on end because of this charged balloon. its a wonderful sight to see the hairs standing
on their ends. and now if you just leave the balloon on your head it will stick to the
head like glue and it does not fall off. now we will do another experiment. if you take
an uncharged balloon it will just fall off by gravity. you knock off some electrons by
rubbing it to your hair and now it will stick to your palm. once again charge the balloon
and you can stick it to the wall. you don't require glue or cello tape for this. now you
can charge several balloons and stick them to the wall. its a great experiment to be
done on a dry cold day. on a cold day charge leaks away.