Build your own catapult, trebuchet, and windmill, then make 'em move! Learn early STEM skills from engineering and design to force, motion and more physics fun, then tweak your machines to solve the tricky STEM challenges!
Build, test and tweak your own STEM machines!
Learn critical thinking, engineering and other kindergarten STEM essentials!
Three machine designs—build a catapult, trebuchet and windmill.
Activity guide with eight STEM challenges included.
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