Writing introduction

Do you know that TV makes your children foolish? TV is one of the principle offender who spoils your lovely children. Most of the children watch television and spend their  time to watch it.Many survey have said the bad effect of TV ,especially   kids are had more influence on TV than adult.If so why does television give many bad effect to children? And what is the bad effect in the concrete? There are three bad effect of television ,and they ‘ll tell us.  Â