There’s not much of a chance of an army of orcs and trolls invading your workplace–or is there? Play it safe and equip you cubicle with the Mini Ballista Launcher Kit ($17). This contraption – laser cut from select hardwood – fires little wooden missiles up to 30 feet, so you’re sure to keep the beasts (or your supervisor) away. Should this fail to keep the enemies at bay, you can always try hot oil.