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Engino
$29.99 at Amazon

Engino Mechanical Science Screws Kit, the fun and easy way to learn about physics! Budding engineers will learn how worm gears are... used, how screws can convert circular to linear motion, and more while they have fun building 5 working models! 5 models in all: screw press, folding lifting platform, 2 cranes, and a vice. Included is the 36-page activity book with detailed explanation of the different technological principles applied. 150 piece in all. For kids age 8 and up. Warning: Choking hazard, for children 8 and up. Order today! Engino Mechanical Science Screws Kit Read More

Engino
$24.94 at Amazon

Engino Mechanical Science Cams & Cranks Kit makes learning about physics FUN! Inquisitive youngsters will learn all about transmit...ting power using cams and cranks, converting motion, and more... all while they have fun building 5 different educational models! Kids will learn to make an oil drill, flying eagle, crane, and more, and with the included 36-page activity, it's surprisingly easy. 104 pieces in all. For children 8 and up. Warning: Choking hazard, for children 8 and up. Order today! Engino Mechanical Science Cams & Cranks Kit Read More

Engino
$17.91 at Amazon

Expand Engino's inventor set 25 to set 30 without having to buy the bigger set at full cost Multidimensional construction system; ...Build structures and machines with 114 parts Printed instructions are included with these fun, easy to assemble models - more plans can be downloaded from Engino's website Excellent addition to a home-school curriculum Another fun, educational product from Elenco, the company that brings you Snap Circuits, Recommended age group: 5 years and up, Manufacturer: Elenco Electronics Inc Read More

Engino
$17.99 at Amazon

Expand Engino's inventor set 40 to set 60 without having to buy the bigger set at full cost Multidimensional construction system; ...Build structures and machines with 114 parts Printed instructions are included with these fun, easy to assemble models - more plans can be downloaded from Engino's website Excellent addition to a home-school curriculum Another fun, educational product from Elenco, the company that brings you Snap Circuits, Recommended age group: 5 years and up, Manufacturer: Elenco Electronics Inc Read More

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