Little minds can be very complicated minds. The mere fact that you’re young — even extremely young — does not mean that you don’t experience a world of complex feelings and thoughts. That’s one reason so many U.S. kids — about 1 in 5 according to a new study — suffer from some kind of psychological disorder. TIME’s newest Health Checkup explores what it takes to raise a happy, emotionally healthy child — and how to help kids who may already be less happy and less healthy than they ought to be. The answers are there; parents need to know what they are.
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