Well, gee Jennifer, why don't you go ahead and make your daughters a costume and have them wear that? Who's the parent here?
Luckily, we have all boys, and 2 are going to be a pirate and one a cowboy.
Sadly, many of the old-style costume ideas have been relegated as too politically incorrect by some. Cowboys, pirates, soldiers and "hobos" are too anti-PC for many.
Remember the typical liberal line: Halloween gives people the chance to act out roles they can't be during the day: sluts, whores, strippers, and the like.