Kids and non-standard costumes

What do your kids want to be for Halloween?  So far, ours don't want to be anything you'd normally see on the street at Halloween. Instead, they want to be these things.

• a bat with no skull
• a Zombie Granny
• dead Tweety Bird

Oh yes. We are embracing the gothic in our house!

Is there a costume shop that helps with this kind of thing?