Izzy's taking phone calls

So for Christmas we received a toy cell phone for Izzy. Now I am trying to "Montessori" Izzy so I am trying no light up toys, battery operated, etc.. etc., but I caved in because it was a gift. So I gave the phone to Izzy and when you open it up, it says, "Hello" and when you close it, it says, "Good-bye". Now mind you, Izzy is only 11 months old, she opens the phone, it says hello to her, and she puts it right up to her ear. How does she know how to do that????? No more phones for Izzy, too young.