{"product_id":"8722322587671","title":"Simple Machines Block \u0026 Tackle","description":"\u003cp\u003eOne pulley can be used to change the direction of the force applied by a cord several pulleys can be used to make this simple machine. A small force on the cord can be used to lift a large weight. Experimenting with the device shows why: lifting the block by a short distance requires that the cord be pulled a long distance. This classic wooden model offers children a basic concept of the laws of physics. Desktop sized.\u003c\/p\u003e","brand":"LEARNING ADVANTAGE","offers":[{"title":"Default Title","offer_id":45137520361495,"sku":"ERSCTU512","price":22.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0136\/0537\/1963\/files\/c66d4a41cde525780692d8b49cc500dcf3664229_3116022a-2d62-4e59-91c9-e71104187367.jpg?v=1778850401","url":"https:\/\/everydaysupplyco.com\/products\/8722322587671","provider":"Everyday Supply Co","version":"1.0","type":"link"}