What about that game whe you all put a finger in and the one with the slowest reactions gets an electric shock? Your kids could have a great time playing it with them!
Or how about a gift token for some discs for their MP3 player - that'd confuse 'em!
I've also checked out the Argos catalogue - there's some spectacular stuff in there - eg
Glass dolphin clock - 4 glass dolphins 'swimming' around brass clock on a mirror base
'World's biggest hangover' set - includes bag for ice cubes to press on head.
A wide selection based on the game show 'Bullseye' - especially the '10" Bendy Bully With Sound' - only £14.99
Various dressing up outfits - can you picture mil as Wonder Woman & fil as Elvis Presley?
So what's it to be?