Check out thrift stores and second hand stores like Goodwill for inexpensive costumes and supplies. MarthaStweart.com also has instructions for homemade Halloween costumes, or you could visit your local library for books on DIY costumes.
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Start by looking at what is most popular at costume shops such as www.spirithalloween.com/boys-costumes. Then see what the boys themselves want to be!
There are many stores that sell cheap costumes in Edmonton, Alberta. Some of these include Halloween Distributors, Custom Costumes, and The Disney Store.
There are some dresses fore the girls and some little cowboy costumes and the boys: i dunno! But i do know that the boys have cowboy costumes as-well as pirate costume's! :)
There are many popular costumes worn for Halloween such as a witch costume. Boys costumes include super heroes and vampires.
Couple costumes are adorable. Some suggestions are: Romeo and Juliet, Fred and Wilma Rubble, Homer and Marge Simpson, or you could go as celebrity couples.
There are so many different costumes for little boys to wear. A lot of these costumes are easy to make, and you can find tutorials on how to make them online. One costume you could do yourself is a coyboy.
Most boys like to be a hero for Halloween. Try Superman or Batman costumes for the boys. You can also look up costumeideazone for more ideas on what to wear for your kids. Try going to Walmart or Targets and find some costumes that they like.
Some excellent costumes for kids this year include Disney Princesses for girls and Captain America for boys. The Angry Birds costumes are also going to be very popular.
Princess. Cheerleader. Schoolgirl. Anything with a skirt!
wolf and vampires for boys,witch or vampires for girls
If you want to keep the Bug Theme going, I would suggest a caterpillar or a spider for an infant boys costume. ToysRUs.com has some adorable options for infant costumes and you can narrow the search for infant boys specifically.