As long as adults and kids don't lay shame on children when they play with an "opposite gender" toy, that's what really matters. Getting the toy makers and marketers to tone down the intensity of gender role cues in store aisles and adverts would help even more. My favorite toy maker as a child was Whammo...nothing gender specific, and the toys were good goofy fun, especially for group play. Nerf comes close to that, though an argument about girls playing with a Nerf football and Nerf sponge dart guns might come up in a conservative household....where concerns about foam and plastic toys' roles within a Biblical paradigm must be a fucking hoot to over hear.