{"product_id":"national-geographic-da-vinci-catapult-wood-building-stem-kit-for-kids","title":"National Geographic Da Vinci's Battalion 3-Model STEM Kit","description":"\u003cp\u003eBuild three working wooden models inspired by historical siege machinery: a ballista, bombard, and catapult. Assemble the mechanisms, then use the included targets and projectiles to investigate construction, force, and trajectory.\u003c\/p\u003e\u003ch3\u003eEducational specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubjects:\u003c\/strong\u003e Engineering, physics, and historical technology\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Three-model wooden building kit with instructions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Laser-cut wooden components, rubber bands, sandpaper, 15 projectiles, and six paper targets, according to the imported listing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEstimated build time:\u003c\/strong\u003e 1–3 hours per model according to the imported listing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e National Geographic; imported copy identifies Blue Marble as product developer\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFollow the included assembly and projectile-use instructions. The kit is a model-building introduction to historical machinery, not a claim that all three models are documented Leonardo da Vinci inventions.\u003c\/p\u003e","brand":"National Geographic","offers":[{"title":"Default Title","offer_id":50524146761979,"sku":"B07C4KBJ1X","price":43.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0814\/4538\/8539\/files\/91b0HII7qoL._AC_SL1500.jpg?v=1790230633","url":"https:\/\/dandelionrootsshop.com\/products\/national-geographic-da-vinci-catapult-wood-building-stem-kit-for-kids","provider":"Dandelion Roots","version":"1.0","type":"link"}