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 37 of 49 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 37 STEM Sink or Float Activity Set STEM Sink or Float Activity Set ($28) explores basic physics, critical thinking, and problem solving. STEM Sink or Float Activity Set $28 from walmart.com Buy Now Previous Next Start Slideshow StemToysShoppableKid ShoppingGift GuideGifts