I mentioned the Old Navy coupon earlier today and I just wanted to update that I did go to my store and the Halloween costumes for kids were 75% off.
The little cupcake above was just $6.50! I was surprised that they actually had quite a few to choose from. Also, if you grab that Old Navy coupon, you should be able to get one for about $5.
They also had dinosaurs, hamburgers, butterfly costumes and a few others. I am sure these are going to go FAST so you might call ahead to your store and see what they have available. I did see a lady behind me buying at least 8 costumes but there were still quite a few to choose from.