Hi,
I got this idea from the Your Baby Can Read instruction video. He said to sit with your baby in front of a mirror and move your mouth and tongue in different ways with you baby... Later I saw a video about Montessori teaching and they briefly showed a lady and a baby sitting with a mirror. I think they were doing that. Where can I find more information on that. I know it sounds really simple but...

I like knowing I'm doing it right.
Thank you in advance.