At almost two feet tall, the Large Trebuchet Demonstrator hits the spot for showing a classroom the physics of this classic siege machine.

This big cousin to the Trebuchet Kit can sling up to a 10-gram projectile using up to 1,000 grams of counterweight. The demonstrator also comes with the option of a wheeled platform, making it more like the trebuchets from the pages of history.

Includes laser-cut basswood parts, wooden dowels, string, sling material, hardware, 30 mass plates, and clay. Built model with wheels is 21" H x 26" L x 6-1/2" W. Assembly required using glue such as HD Bond II and a screwdriver, sold separately.