Halloween, or All Hallows Eve, will soon be here? What will you dress up as this year??
I think so. I am not sure what it will be. 
Halloween marks the beginning of Allhallowtide, a 3 day holiday that remembers the dead, martyrs, and the departed.
That does sound scary. How long has halloween been around
We believe that Halloween originated as a Celtic tradition, it may have been a harvest festival related to Samhain.  In any case it was a pagan holiday. 
How did it become what it is know as today
It was Christianized into the holiday we know today.
Oh ok, there is still people who do not celebrate it because of that I bet?
Here are some Halloween activities for you to put on your calenday: go trick or treating, carve a jack-o-lantern, have a seance, light a bonfire, bob for apples, tell scary stories, play a prank, watch a horror film.
Those all sound fun to me.