JPFO has the makings for them. I guess sending gun-shaped cookies to school would be an interesting test of "no tolerance" policies.
I remember a few years ago NRA had, and won, a case where a Virginia school required a kid to take off a T-shirt that had the letters NRA spelled out with images of competitive shooters, etc.. The questioning of the school's witnesses was fun, since they had to admit that they had the Virginia flag in the school, which shows an image of a woman (with one breast bared!) holding spears, as I recall. And an image of a fellow, presumably a tyrant, dead at her feet, thus depicting not merely weapons, but a homicide. And then there was the great seal of the United States, with an eagle holding arrows, the seals and flags of various military branches, etc. -- did they propose to ban those, too?