Back in the 15th century, Leonardo da Vinci took time away from his painting and sculpting to oh, you know, invent a few weapons of war. We have (3) of them in the form of pre-cut wooden models that you assemble. You’ll need a bit of glue, and you, or the kid you give these to, will learn a little history and the awesome STEM concepts of levers, simple machines and launching stuff. Detailed instructions included. You pick: the stationary Catapult, approx 7” x 2/14” x 3-1/2”; the rolling Giant Crossbow, approx 6” x 3-1/2” x 2”; or the Bombard, grandfather of the modern cannon, approx 4-3/4” x 2-1/4” x 3-1/2”.