Popsugar Parenting Stem Best Stem Toys 2019 49 Stem Toys That Make Learning More Fun Than Ever 9 April 2019 by Rebecca Brown View On One Page Photo 21 of 49 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 21 K'NEX Education – Intro To Simple Machines: Gears K'NEX Education – Intro To Simple Machines: Gears ($40) teaches building, evaluating, and teamwork. K'NEX Education – Intro To Simple Machines: Gears $40 from walmart.com Buy Now Previous Next Start Slideshow StemToysShoppableKid ShoppingGift GuideGifts