The best toddler gift! Such a fun learning gift for my 3 year old ! Encourages STEM learning but creating and building with cause and effect gears. So much fun! toddlertoy gears stemlearning Christmasgifts learningtoys amazonfinds foundonamazon amazontoys kidtoys trendingtoys LTKKids LTKGiftGuide LTKCyberWeek