Barbie Sweet Talking Ken Doll: Ken is Barbie dolls ultimate boyfriend for every occasion. Why? Because the Ken doll says whatever you want him to say. You talk; he records up to 5 seconds of sound, and plays back. Just press the button on Ken doll's chest to record your voice, a microphone is built into his chest, and then by pressing 3 different buttons on Ken doll's lower back you can play back in a high, normal or low pitch. Sweet.