Parents, step away from the toy aisle. Turns out your toddler doesn’t need a mountain of plushies, plastic cars and magnetic mayhem — they might just need four toys. Yep, four. According to Dr ...

Metz led a widely cited 2017 study at the University of Toledo, observing tots between 18 and 30 months old in rooms outfitted with different numbers of toys. When kids were let loose in a space ...