She may look like an ordinary doll, but My Friend Cayla, made by U.S. company Genesis Toys, is now banned in Germany over fears she could be used as a spy. The doll comes with an app and Bluetooth connection so she can interact with kids, but the German government—as well as some U.S. watchdog groups—says the connection could easily be hacked to listen in on children. Security experts have also warned that hackers could use other internet-connected devices, like Amazon’s Echo Dot, for surveillance. Germany has some of the strictest privacy laws in the world, partly because of its history. During World War II (1939-45), the Nazis’ secret police spied on citizens; similar tactics were later used by East Germany’s Communist government. Says one German official: “Objects that have concealed cameras or microphones that can send information endanger the private sphere.”