Here's a fun Halloween game you can try with your kids (though I suppose they already know it). We used to have a great laugh over it when I was little. One person volunteers to meet the Ghost of Old Man Halloween (though the PC brigade may accuse me of ageism at this point). They are blindfolded and brought to meet old man halloween. the other kids, who are in on the game, make spooky wwwooooo! noises and maybe blow lightly on the top of the other kid's head etc., like ghost train stuff. The volunteer then sits on a chair and is asked "do you want to meet the ghost of old man...?"

"He is a ghost! You cannot see him, but you can hear him!" (cue heavy footsteps from SFX CD or kids stomping around)
"And you can feel him!" (again, cue sinister laugh from SFX CD)

Then, you take the kids hand and say "feel old man halloween's face" (use a halloween mask, loet them feel it)
"now feel old man halloweens old crinkly skin" (anything old and crinkly will do - a rubber halloween mask, a soft plastic bag etc)
"feel old man halloween's beard" (a coconut, doormat, whatever)
"feel old man halloween's bony fingers!" (some dry chicken bones strung together)
"now feel old man halloween's teeth!" (old set false teeth or plastic vampire teeth)

All the time suspense is built up with the SFX CD or the other kids making ghostly voices etc.,

Then for the finale, "Feel old man halloween's....EYE!"

The last said dramatically as you take one finger and plunge it into a pre-cut hole in an orange! It never fails to raise a shriek! Not for the VERY nervous of disposition, of course!