Like most 4-and-a-half-year-olds, Lev Bielski loves playing with his big sister, spelling his favorite pastime “pool” on the letter board and cuddling with his parents on movie nights. But it’s been a long journey for the golden-haired “surfer bro” who loves splashing in the water at surf camp and trying on Dad’s volunteer firefighter gear. Up until four months ago, Lev was self-harming until he was black and blue, unable to make eye contact and keeping to himself in a corner all day. He was inching dangerously close to being confined by a punishing helmet and sedated with heavy antipsychotic...