Navajo infants get so attached to cradleboard that they cry to be tied into it. Kikuyu infants in Kenya get handed around several "mothers," all wives to one man. . . . Mothers in rural Guatemala keep their infants quiet, in dark huts. Middle-class American mothers talk a blue streak at them. Israeli kibbutz mothers give them over to a communal caretaker . . . Japanese mothers sleep with them. . . . All these tactics are compatible with normal health—physical and mental—and development in infancy. So one lesson for parents so far seems to be: Let a hundred flowers bloom.