When I asked my kids to come up with ideas for the theme 'unconventional weapons', I first had to explain Weapons to them (they're 4 and 2 and although they're boys, they are not into fighting / knights / cops much) and then 'unconventional'. In the Netherlands, there's this nursery rhyme about 'Opa Bakkebaard' (Gramps Sideburn) who has an unconventional style of doing chores. Somewhere in the mix, this went from doing chores to being a cop, and before you know it you're on the roof fighting off gangs of thugs armed with nothing but a fire hose and a hair dryer.