My Grandson just turned two in November. After Xmas he began having conversations at both the day care and in my home.
Our house I bought new, no one has died here. He is not afraid. He follows this "entity" around the house... Then sits and has conversations with it/her/him. Then will come back to either granny or me and sit with us.
Randomly, and without provocation, he will notice something and get up and go into other room and sit and carry on random, sometimes inaudible, conversation. Nothing scary... Just talk. At no apparent time, he will get up and come to his mom, me, or granny and sit in our laps... And state "ghost is asleep". He does this at his day care, also. He is not the least bit scared and enjoys the interaction.
This began like all of a sudden, no trigger. You can be sitting talking to him, and out of the corner of his eye... He will notice, what seems to be movement to him, and get up and spend 10 minutes to half an hour speaking to It/her/him. He sometimes stands up and follows whatever it is... To another location in the house and continues his interaction. Not scary, at all, just trying to understand his mind-set. He will talk to mom, dad, granny, or me about the ghost... But in very generic terms.
Once he got up, after 30 minutes of talk with it... And came and sat in my lap... His only utterance was "ghost asleep"...