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 18 of 49 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 18 Gears! Gears! Gears! Space Explorers Building Set Gears! Gears! Gears! Space Explorers Building Set ($58) teaches problem-solving, sorting, sequencing, counting, matching, and patterns. Gears! Gears! Gears! Space Explorers Building Set $58 from walmart.com Buy Now Previous Next Start Slideshow StemToysShoppableKid ShoppingGift GuideGifts