Simone has been wearing an old pair of over-the ear Sony headphones that I no longer use. We called Nana on the phone through the computer so Simone could hear Nana (and talk to her). Now it's a very enticing activity.
One really nice thing about it is that Simone actually talks with the person on the other end of the phone because she gets to use the headphones and microphone. When she uses the regular phone, Simone often gets distracted, or just speaks very softly.
What I found funny was that when she wears the headphones (and is listening to music), she talks really loudly.