Last month, Robohub posted a story about the first commercial toy that could respond to voice commands. Radio Rex, a toy dog that jumped out of a doghouse when called, was made and sold in 1922, decades before the first digital computers. Apparently, surviving models of Radio Rex still work today. Rex worked off of acoustic energy: a spring attached to the toy dog released when struck by 500Hz audio--roughly the "eh" vowel sound in the dog's name. The appeal of Rex resonates today, in our interactions with computers and robotics. Social robotics, pioneered by researchers like MIT's Cynthia Brezeal, is the next phase in human-computer interaction. It's why devices like the upcoming Jibo are so fascinating; roboticists believe that the humanizing of technology will forever change our relationship with it.