Well go on the Marvel website and find out a superhero u like then buy the costume
Go to your local thrift store or costume shop to find a superhero costume. Or if you would like a specific super hero, go to http://ebay.com/ to search for your character.
I've left a link below for you to check out. They have a few different superhero accessories that you can mix and match to make your own costume - Check the accessories department and browse a lot of them and you'll find tons of creative combinations.
I would start at Target or WalMart first. This costume should be easy to find and they are relatively inexpensive. If not try looking at party stores and costume stores.
Go to the Masks and Capes costume shop and get an official Superhero ID from the owner. You do not have to wear a costume.
An animal costume would the warmest, because it is make of cloth.
You can find it at any mall near Halloween, but it usually comes with the costume. You can search places like on amazon.com/ca (depending on where you live), amazon is very reliable.
You can find a kids' Jane Banks costume at costume stores, online retailers like Amazon or HalloweenCostumes.com, or at stores specializing in children's costumes. You may also be able to find DIY options or sewing patterns to make your own costume.
You can find a cat costume for a two year old at many local Halloween costume and party stores. Stores such as Party City, Michaels, Walmart, and Target also offer them.
Costume stores party city
Straight costume jackets can be found year round at Party City and costume rental stores. Seasonal stores like Spirit Shop will have them in stock when their stores open at the end of September.
One can find a ninja costume from a variety of different places. These include fancy dress and costume stores, as well as online sites such as Amazon or eBay.