Happy Halloween! Meet my daughter, Mars, a.k.a. Magnus Bane. This isn’t her actual Halloween Costume – meaning the one she’ll trick-or-treat in tonight. This is her third; the one thrown together in a moment of need for Harvest Fest with friends at a local elementary school. We take Halloween seriously and love dressing up, especially when we can get creative with what we already have.   Mars is a changling.    Her other two are a homemade homemade Spiderman costume  and then, for tonight, a clown. She’ll wear the same costume I wore at her age. “It’s an antique,” she said. Yep, we’re in that stage where I’m often reminded I’m practically fossilized.   My mother sewed a blue and white polka dot…