Is life too dull? Some schools in the US have banned Halloween celebrations. But some parents say they have gone too far.
Six reasons why being scared is good for us
School ghouls: The first known reference to trick-or-treating dates from 1927. Glossary
Halloween - A celebration observed in many countries on 31 October, on the evening before the Christian feast of All Hallows' Day.
New Jersey - A northeastern US state, close to New York.
Religious - Relating to a religion, or belief in God or gods.
Hormones - Chemicals created inside living creatures. They are used to send messages from one part of the body to another.