Halloween is on October 31. The historical roots of the holiday are from Europe, as a celebration of "All Saints Day", a day when people honor and pray for those who have died. It was thought to be a day when souls of the dead roamed in search of their resting place, which is perhaps where the "spooky" traditions of today came from.
These days, in the U.S., it is more about carving Jack-O-Lanterns, dressing up in costumes, going to costume parties, and Trick-or-Treating for candy.
1) Carving a Jack-O-Lantern: When you take a pumpkin and carve a face onto it, it becomes a Jack-O-Lantern! This is a really fun tradition. People light the Jack-O-Lantern on the night of Halloween, and this is a sign that your house welcomes kids to Trick-Or-Treat. You can find instructions online about how to carve a Jack-O-Lantern.
Here is one link: http://www.instructables.com/id/How-to-Carve-a-Jacko-lantern/
2) Costumes: Children enjoy dressing up in costumes and most elementary schools will have a party in the classroom where kids can wear their costumes and celebrate with games, crafts, and treats. Older kids in middle school and high school are sometimes allowed to wear costumes to school, as well. Schools will discourage any bloody or violent costumes.
Adults can also enjoy dressing up in costumes (fun to feel like a kid again!) and often friends will host a Halloween party and encourage everyone to wear a costume.
If you would like to have Trick-Or-Treaters come to your house for candy, you should light a Jack-O-Lantern outside your home and turn on your outdoor lights. If there are a lot of children who live near your home, you may get a lot of Trick-or-Treaters! If you do not have many kids in your neighborhood, then you might not get any visitors.
If you do NOT want to have Trick-or-Treaters come to your house, be sure to turn off all your lights and do not put a Jack-O-Lantern out. Most kids know not to visit houses where all the lights are off.
There are many fun things to do all around the Eastside and Seattle during
Halloween. You can do an online search and find pumpkin patches, festivals, haunted houses, and more.
Here is a link to some October & Halloween events around the area:
As my kids got older, they preferred scarier things, such as the Haunted Georgetown Morgue in downtown Seattle (older kids and adults ONLY... it's really pretty awful and bloody):
There is fun for all in the fall season. Be safe, have fun, and enjoy this colorful season!