Christmas ornaments can be some of the easiest and most fun decorations to make. You can find easy to follow instructions at familyfun.go.com and bhg.com/christmas/ornaments/.
There aren't that many scary decorations and they seem to be limited to ornaments. Try http://weburbanist.com/2008/12/19/strange-bizarre-geek-christmas-tree-ornaments/. You can also find skulls decorated with Christmas decorations at http://www.squidoo.com/creepy-christmas-decorations
You can find a good deal of outside Christmas decorations. You can find outside Christmas decorations for a good price at www.amzon.com, www.overstock.com, Walmart, and Target.
You can find shatterproof plastic Christmas decorations from here: (http://www.displayit-info.com/christmas/trim_orn.html). They are very colorful Christmas ornaments for your tree.
You can find bulk Christmas decorations online at bulk-christmas.buycheapr.com. You may also find hanging decorations, lights, candles, and other ornaments in bulk at www.orientaltrading.com
You can find unique Christmas decorations and ornaments at http://www.squidoo.com/christmas-tree-themes. There are also gothic Christmas trees and decorations. Try http://www.squidoo.com/GothicChristmas
You can find kits for kids to make ornaments and other Christmas decorations at Michael's, Hobby Lobby, and Joann's. If you want ideas for decorations that kids can make, you should try http://familyfun.go.com/christmas/christmas-decorations/christmas-ornaments/, familycircle.com, or http://www.dltk-holidays.com/xmas/crafts.html.
You can find ideas and instructions for handcrafted Christmas decorations on this site (http://familyfun.go.com/christmas/christmas-decorations/christmas-ornaments/). You can make anything from homemade paper stars to candy cane signposts.
You can find Scooby Doo and Shaggy Christmas ornaments online. You can find these at Amazon.com. They have a neat selection of Scooby Doo and Shaggy ornaments that will make your kids very pleased.
No it really isn't all that important to order outside christmas ornaments before halloween. You can find christmas ornaments year round online or from october to february in your local stores.
There are several online stores where you can order many different types of Christmas decorations and have them shipped directly to your home. Some of these sites allow you to personalize the ornaments for your children.
You can find hand blown glass Christmas ornaments at this site (http://www.christmasforest.com/cat.taf?cat=3&HDR=ornaments). Halloween glass ornaments are on this site (http://dapolonia.com/46-halloween-glass-ornaments).