{"title":"Mechanical Engineering","description":"\u003cp\u003eLinkages, gears and hydraulics — kits where force goes in one end and motion comes out the other.\u003c\/p\u003e","products":[{"product_id":"pump-jack","title":"Pump Jack","description":"\u003cp\u003eA working model of an oil pump jack. A motor turns a crank, the crank nods a beam, and the beam drives a syringe pump with two one-way valves that lifts water out of a cup and up a tube. It keeps pumping as long as the switch is on.\u003c\/p\u003e\u003cp\u003eReal wells cannot be drunk through a straw -- atmospheric pressure gives out at about thirty feet and the oil is thousands of feet down. So the nodding beam sends a rod to the bottom and lifts the oil in stages, one valve letting it in and another refusing to let it fall back. These machines are called nodding donkeys, some stand ninety feet tall, and some have run without stopping for fifty years.\u003c\/p\u003e","brand":"Central Creativity","offers":[{"title":"Individual","offer_id":46454393798844,"sku":"Pum-In-Raw-006332","price":15.0,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 5","offer_id":46454393700540,"sku":"Pum-Cl-Raw-006333","price":73.5,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 10","offer_id":46454393733308,"sku":"Pum-Cl-Raw-006334","price":144.0,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 25","offer_id":46454393766076,"sku":"Pum-Cl-Raw-006335","price":345.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/2219\/9996\/files\/6377edce-freepik_br_efddd395-10da-453b-88fb-9fe2b50e1e8e.png?v=1777574635"},{"product_id":"hydraulic-arm-complex","title":"Hydraulic Arm Kit","description":"\u003cp\u003ePower a robotic arm with nothing but water! This wooden arm swings, lifts, and grips using four pairs of syringes connected by hoses. Push a plunger, and water travels through the hose to move a joint at the other end. No motors, batteries, or electronics are needed. Mastering all four controls to pick up an object takes skill and practice, turning engineering into a challenge that keeps hands busy and minds working.\u003c\/p\u003e","brand":"Central Creativity","offers":[{"title":"Individual","offer_id":46454395797692,"sku":"Hyd-In-Raw-006366","price":12.5,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 5","offer_id":46454395699388,"sku":"Hyd-Cl-Raw-006367","price":61.25,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 10","offer_id":46454395732156,"sku":"Hyd-Cl-Raw-006368","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 25","offer_id":46454395764924,"sku":"Hyd-Cl-Raw-006369","price":287.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/2219\/9996\/files\/36aa2647-freepik_br_eb005090-4812-44db-912a-7ea9c0213c4a-scaled.png?v=1777574635"},{"product_id":"hydraulic-gripper-kit","title":"Hydraulic Gripper Kit","description":"\u003cp\u003eA wooden gripper that runs on water. Two syringes joined by a clear hose: you hold one, the other is strapped to the tool. Push your plunger and the jaws close; pull it back and they open. No motor, no battery, no electronics anywhere in it.\u003c\/p\u003e\u003cp\u003eIt is the simplest honest demonstration of why hydraulics exist. Water will not compress, so a push at one end of a sealed hose arrives at the other end undiminished, around corners a solid rod could never follow. That is the principle behind the brakes in a car, a bottle jack and an excavator, and it is in prosthetic limbs too — a hydraulic knee uses a fluid cylinder to control how fast the knee folds and straightens as someone walks. Eleven steps, and the single-motion sibling of our Hydraulic Arm Kit.\u003c\/p\u003e","brand":"Central Creativity","offers":[{"title":"Individual","offer_id":48402692276412,"sku":"Hyd-Raw-005106","price":10.0,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 5","offer_id":48402692309180,"sku":null,"price":49.0,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 10","offer_id":48402692341948,"sku":null,"price":96.0,"currency_code":"USD","in_stock":true},{"title":"Class Pack of 25","offer_id":48402692374716,"sku":null,"price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/2219\/9996\/files\/Hydraulic_Gripper_Box_b8720a97-1361-411c-bc68-dd0da8bb979d.jpg?v=1792065534"}],"url":"https:\/\/shop.centralcreativity.com\/collections\/subject-mechanical-engineering.oembed","provider":"Central Creativity","version":"1.0","type":"link"}