Skyping a baby/young child

My DD and I have decided that we will skype twice a week with the baby[5 weeks old].

I know it might be a bit early, but what sorts of things do you do when skyping with a baby or young child?

I think there may have been a thread on here before about this? I am not sure. But there are new gransnetters joining all the time.

The one I do remember is them having the same book as yourself.