In November 2014, British toymaker Vivid Toys debuted an Internet-connected doll, My Friend Cayla, that used speech recognition and artificial intelligence techniques to have conversations with kids. By February, researchers had hacked the doll to spew curse words. Now other Internet of Things toys are encountering similar problems. On Wednesday, NBC Chicago reportedthat security researcher Matt Jakubowski had hacked Mattel's Hello Barbie, potentially exposing users' account information, home Wi-Fi networks, and MP3 files recorded by the dolls. Hello Barbie is a version of the classic toy that converses with kids, remembers things they say, and recalls details later. “I was able to get some data out of it that I probably shouldn’t have,” Jakubowski told NBC Chicago. “You can take that information and find someone’s house or business.”