Ghost In Daughters Room?

I have two kids, one six months old, another almost seven, both girls. The oldest is severely handicapped, she has pachygyria and Sturge WeberSyndrome, which has left her unable to talk, walk, move herself, eat by mouth, etc. Tonight, I put her to bed, and my youngest woke up and cried frantically. It scared me so I left the room of my oldest rather quickly after settling her in, and picked up my youngest. The oldest began to cry loudly, as if something was wrong, so I put the baby in her play pen, and walked to the other ones bedroom. Suddenly she stopped crying, and she never does this. I thought, oh please don't be seizing, as she has a seizure disorder, and sometimes when she cries, it causes her to seize. So I ran into her room, and on the way to her i heard her laughing and cooing, total opposite of what she had been doing... the light was off like I had left it. The odd thing is, it was very cold in her room. Also, she has a toy, the kind you get for babies that you attach to the side of a crib, and it projects lights and scenes onto the wall/ceiling, as well as plays lullabies and nature sounds. Well, when I first put her in bed, all I had time to do was flip her over head light off. Somehow, when I came back in, the toy was on, it was even on a setting that I didnt use. It was lit up and playing music. It plays for ten minutes at the max setting, five at the minimum. It was on the table by the end of her bed, on top of the tv. I have no clue how it got turned on, no one else was home. She seemed like someone was talking or playing with her, so happy and laughing. But the room, I got chills in there. I went to the living room, and I waited for ten minutes to pass, knowing it will stop playing. It didnt stop. It kept playing for over 15 minutes. I stopped watching the clock when it past fifteen minutes. Later that night, when I went back in to feed/ change her, I tried to turn it on for her, and it was no longer working. It went do anything. I guess it ran its batteries out. Just a weird night.