The Trebuchet 3D Wooden STEM Construction Kit is a fun and educational project inspired by medieval siege artillery. Designed for school or home use, this eco-friendly model encourages creativity and problem-solving while providing hands-on experience with engineering principles. Featuring adjustable rubber-band tension, you can test different distances and explore mechanics. Made from sustainable plywood, the kit includes clear, colorful step-by-step instructions for easy self-assembly without messy glue. It comes with candle wax for gears, sandpaper, and rubber bands (included when relevant). With high-precision laser-cut parts and sturdy construction, this model offers durability and intricate details for customization.Details:Natural woodPackage measures 12" x 7.1" x 14.8"Eco-friendly sustainable plywood materialVery high precision laser-cut piecesNo glue requiredInspired by medieval siege artilleryAdjustable rubber-band tension for distance testingIncludes clear step-by-step instructionsIncludes candle wax, sandpaper, and rubber bands (when relevant)Total 94 pieces puzzleRecommended age 14+ years