Amazon introduced the Echo speaker, and the voice behind it, Alexa, on November 6, 2014, then opened the device to the public the following July. A little more than a decade later, roughly one in four Americans owns one, and a good share of those households own two or three. Kids in these homes grow up talking to Alexa the way they talk to a sibling, tossing out orders and insults without much thought. A child who feels close to the family's Alexa grows more demanding toward