Buyr.com | Building Sets | LEGO Education DUPLO Early Simple Machines Set 9656, Mechanical Fun Educational Toy and STEAM Learning for Girls and Boys Ages 5 and up (102 Pieces)
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The LEGO Technic Idea Book: Simple Machines: Isogawa, Yoshihito: 9781593272777: Amazon.com: Books
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Simple Machines
Early Simple Machines Set 9656 | LEGO® Education | Buy online at the Official LEGO® Shop EE
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LEGO Education Simple Machines Set # 9689
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Make a Castle Mechanism or Simple Machine
LEGO Education Simple Machines - Crane - Confessions of a Homeschooler