The Ballista kit (pictured) is built of laser-cut hardwood and is a real blast to assemble and fire. It’s a bit more difficult than the other two, due to the fact that you need to “power up” the ballista by twisting the torsion skein. The finished weapon measures six inches tall and fires small wooden projectiles 30 feet.

The Catapult (onager) and Trebuchet are fun to fire too — reaching 12 feet and 18 feet, respectively.

The kit comes with two ½”-thick boards that are CNC’ed out with all of the pieces of the ram, plus a dowel and some twine. All you need to do is carefully finish cutting out the pieces and glue them together.

Once you’ve assembled your battering ram you’re ready to storm the walls of the nearest cubicle.