As you might already know, Halloween is a day when kids and some adults like to dress up in costumes and ask for candy. This is known as "trick or treating." If it's a custom in your culture, then you must prepare candies or treats at home for those "trick or treaters" who will come knocking on your door! If you have no "treats" then they'll play a "trick" on you! So don't forget or else you'll be shocked and maybe a little embarrassed when you open the front door!
Also for those of you who will be trick or treating, don't forget to brush your teeth before going to bed!