For the do-it-yourselvers out there, 10$ will buy you a PDF version of plans that’ll allow you to build your very own tabletop trebuchet.
This model has a 12 inch long arm, is 14 inches from front to back, 6 inches wide and 8 inches tall at the axle. When properly assembled it is capable of tossing marbles over 20 feet!
So, I guess this is another bored-in-the-office sort of product. Of course, you could spin it around and say that you’re building this as a research project to get better acquainted with medieval production techniques. Right?