Lost Souls (1998)

Victor Robinson moves into a new country home with his family. Their son Jesse, finds an old Edison invention in the basement. When they turn on the machine, they start hearing children's voices laughing and playing at night. Their mute autistic daughter, Meaghan, becomes more animated; singing and painting figures inside of a circle on the walls. Other strange events start to take place around the house, such as two strange figures burned into the grass and even an attempted break in. After doing some research, Victor discovers that two children were murdered years ago in the town, and their bodies were never found. After visiting the man who confessed to the crime, he is convinced the spirits of those children are trying to warn him that their real killer is still loose.