Pulleys All Around, , North Star Editions, Trudy Becker,Technology/Machinery & Tools,JUVENILE NONFICTION, elevators; wells; flagpoles; blinds; lifting heavy objects; grooved wheel and rope; knees and elbows; sports equipment; science and technology; easy physics; simple machines for kids; technology books for kids; science books for kids; kids nonfiction; juvenile nonfiction; grades 1 and 2,, Using Simple Machines, United States, en-UShttps://northstareditions.comelevators; wells; flagpoles; blinds; lifting heavy objects; grooved wheel and rope; knees and elbows; sports equipment; science and technology; easy physics; simple machines for kids; technology books for kids; science books for kids; kids nonfiction; juvenile nonfiction; grades 1 and 2, [BLURB],[CITY],,books, ebooks, biblet, Book2look