Well, folks, the day has arrived. Em has transformed from a person to a parrot, a toddler-voiced echo that follows C and I around the house. Many of our conversations go like this: “Emmy, it’s time for you to brush your teeth,” says I. “Bruthh your TEETH!” says Em. “Make sure to go up and down with the toothbrush, ok?” says I. “Up and down. Up and down!” says Em. For a few seconds, she actuall…