Conveniently sized to sit on your desk, this intimidating little machine is an actual working reproduction of an onager.

The weapon is all wood and twine with no metal parts, but it packs a big punch. Load it up with the included wooden balls or get creative with marshmallows, coffee creamers, erasers and more to see how many cubicles they can soar above before landing.

Properly constructed, the onager has a range from 10 to 20 feet. The ancients were able to use nothing but wood and ropes to build machines that could hurl heavy stones great distances, now you can do the same to enforce peace in your office or dorm room.

Build it yourself in under three hours, because this kit includes everything you need except for glue and a few simple tools like scissors, sandpaper, and a file. Colors may vary.

Warning: This is a representative model of a real ancient military weapon. Use only with competent adult supervision.