I suggest going to "Micheals",a well known Arts and Crafts store. You can find different materials such as sewing kits, fabric, glitter, and many more. Your local dollar store also carries several ideal products at a cheaper price.
You don't you buy them
you go buy a giraffe and then you put the giraffe on a dog and theres your halloween giraffe costume
You buy one. It is probably to hard to make one yourself.
You can buy one or rent one from a costume store. If you are feeling really creative, you can make one yourself.
You could make your own Halloween costume if you are creative. The following website offers cheap Halloween costumes: www.zoogstercostumes.com/landing/cheap.php
you buy the wolf costume during the halloween party
Its an awesome costume you should buy it. Yes, if you like the costume, you should buy it.
There are plenty of Riddle Costume for all ages that you can buy at many halloween costume stores.
Buy wings at target. Sew them on to a shirt or jacket. Put on the shirt or jacket and you have your costume.
Part city
if you buy it..then sure ?
The most popular Halloween costume for medieval times is a knight. You can find out how to make a homemade knight costume here: www.coolest-homemade-costumes.com or buy one here www.buycostumes.com