Because they are probably celebrating halloween because it's nearly Halloween.
Someone can buy fancy dress costumes in the UK at Argos and Fancy Dress Ball. These two stores have hundreds of fancy dress costumes specifically for Halloween.
Dress ups refers to costumes.
One way to find ideas for childrens fancy dress costumes is to get inspiration from the many children costumes for sale online. You can browse sites such as AllFancyDress or PartyPacks under fancy dress costumes. That will surely give plenty of ideas.
They are outfits and costumes worn to dress up or disguise oneself on Halloween.
They dressed up in costumes from the time when Halloween was considered Samhain. The villagers used to dress up as the demons that were supposed to be able to escape on October 31. Supposedly if you dressed up as them, they would be scared off.
zuka dress
Zorro is a costume.
People dress in costumes for Halloween because when Halloween was first started the Samhian city believed that it was easier for the spirits to come to Earth from the other world. And the Costumes were worn to ward off the Spirits.
A lot of dress up costumes can be found at Local Toy's R Us and they vary from Cops to Batman. Also Amazon has a large selection of Dress Up Costumes. Here is the Link to the Amazon Store. Hope This Helped! http://www.amazon.com/Costumes-Pretend-Play/b?ie=UTF8&node=166316011
People can buy fancy dress costumes for ladies from many stores online and offline. Some of those stores are Amazon, Buy Costumes, Argos, Ebay, Asda and Party Delights.
You can rent Viking fancy dress costumes at a few online websites such as Pronto Adult Costume Rental, Rent A Costume, and Costumes for Rent. Some towns have stores where you can rent adult costumes.
Elephant? I not to sure