Dive into history with this mechanical wind-up 3D puzzle of Leonardo Da Vinci's fighting vehicle, a replica of the tank designed in 1487. This intricate model features 360° canons, sloped armor for increased stopping power, a rotating rubber-band mechanism, and wooden gears inspired by the original invention. With a stop-and-go lever, this historical masterpiece is a must-have for any history enthusiast or puzzle lover. Eco-friendly 3D STEM model to assemble and customize at school or home. Made of sustainable plywood material with very high precision laser-cut details. Includes clear, colorful step-by-step assembly instructions.Details:Brown stain and natural woodPackage measures 10" x 9.4" x 6.1"Made of plywood materialFeatures 360° canonsSloped armor for increased stopping powerRotating rubber-band mechanismWooden gears inspired by original inventionStop-and-go leverEco-friendly sustainable plywood materialNo glue requiredIncludes candle wax for gears, sandpaper, and rubber bands (when relevant)Clear step-by-step assembly instructionsAll-inclusive box for self-assemblyTotal 363 pieces puzzleRecommended for ages 14 and above