Thames & Kosmos Simple Machines Science Experiment & Model Building Kit, Introduction To Mechanical Physics, Build 26 Models To Investigate The 6

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3-D Engineering: Design And Build Your Own Prototypes (Build It Yourself)

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Thames & Kosmos Kids First Aircraft Engineer | STEM | 32 Page Full-Color Illustrated Storybook | Ages 3+ | Preschoolers & Kindergartners | Develop