{"product_id":"puzzle-great-minds-da-vincis-ball-bearings-puzzle","title":"Puzzle Great Minds Da Vinci's Ball Bearings Puzzle","description":"\u003cp\u003eJust one piece from the Great Minds puzzle range.\u003c\/p\u003e\n\u003cp\u003eWill you be able to master this challenging wooden brainteaser?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan You Make the Ball Bearings Sit at Opposite Ends of the Puzzle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLeonarda Da Vinci (1452-1519)\u003c\/p\u003e\n\u003cp\u003eHe conceptualized the first helicopter. He knew that the propeller on his helicopter design would need to rotate extremely fast for lift off, and that he would have to find a solution to the friction problem. Ball Bearings, together with a lubricant, would significantly reduce friction, greatly increasing the propeller's speed.\u003c\/p\u003e\n\u003cp\u003eAlthough the use of Ball Bearings was known to the Romans, it's Leonardo Da Vinci who is generally credited with their invention!\u003c\/p\u003e\n\u003cp\u003eSuitable For Age 8 Years \u0026amp; Up\u003c\/p\u003e","brand":"Professor Puzzle USA., Inc","offers":[{"title":"Default Title","offer_id":49748098351380,"sku":"166913","price":8.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/1086\/0564\/files\/47644e74da_20v_201.jpg?v=1731432771","url":"https:\/\/homeportonline.com\/products\/puzzle-great-minds-da-vincis-ball-bearings-puzzle","provider":"Homeport","version":"1.0","type":"link"}