Guess who lets out a ghostly wail.
Necker or blindfold - maybe a spooky mask with eyes holes blanked out so they cant see out.
Sit the kids in a big circle.
Put some spooky music on and take it in turns for one child to be blindfolded and walk around the circle,
touching the other children's heads.
When the music stops, the child that the person who is 'it' has their hands on must let out a ghostly wail.
The person who is 'it' must try and guess who it is.
If they guess correctly they swap around.
If they do not guess correctly they go around the circle again.