Ever bobbed for apples. A pretty mundane activity but children do seem to enjoy it. Of course,
if you are of a practical joker nature you let a few children have a go and then the last one once blindfolded you swap the lovely bowl filled with clean water for a bowl filled with a mixture of piss, blood and urine (for the more conservative parents they may use blancmange, jelly, tinned fruit cocktail and cream.) Once the bowl is swapped the child bobs their little precious head into the rancid bowl. The adults and children laugh and usually the tricked child sees the fun in the joke.

If the tricked child has an undiscovered Anti-social personality disorder then what you have unwittingly released is hell and slapstick events that did cause harm. Your imagination can takeover as to what a psycho 7 year old does when humiliated in front of a group of friends. Not quite Damien but close.
( d.r._and_quinch when will you be famous?, Fri 10 Oct 2014, 13:12, 2 replies)

Either that or get them bobbing for chips

(the other guy not the one that gave you coochie warts, Fri 10 Oct 2014, 13:30, closed)

I'm not very imaginative.
Could you post the rest of this story, please?
( monster munch person, man, woman... camera... TV?, Fri 10 Oct 2014, 13:30, closed)