You could just have some poltergeist type energy. Kids see energies and things because they are more open. Don't be afraid... easy for me to say... generate feelings of calm in your home, relaxing music, and mentally see the energy dissipate. You could give your child a soft toy and tie a story to it that says it protects her from whatever she is tuning into. Maybe she could draw a picture of what she is seeing. If it's scary you can burn it and tell her it's gone now. Something of that nature. Don't react keep calm and a good sense of humour...joke about it.