The kids aint all right.

[peter johnson]

How could I forget "Children of the Damned", by John Wyndham, the same guy who gave us "The Day of The Triffids"?
One of the very great British Horror films ever made -- it has George Saunders in a very sympathetic role, after decades of playing faggy/sort-of Vincent Price-type cowardly villians.
Nah, the original black & white British original is superior to the Carpenter film, as much as I do enjoy Carpenter.  See numerous "remake-argument" threads here.
"The Midwich Cuckoos" is the title of the really superior book, in case anyone appreciates a good scary read here.
* * *
"Children of The Corn" I saw on the Big Screen when it first came out.  Something that has been cropped out of the VHS and DVD versions of the film, currently available, is the highly-visible camera crew following the car in the opening sequences.  Everyone in the theatre I sat with laughed out loud at that, and we are currently denied the pleasure.
All we have to laugh at now are puberty-ridden redheaded boys saying "Outlander! Outlander!" over and over again in a throaty voice . . .
peter crane/denny johnson

[biff_debris]

My fave will always be The Children (1980). Those little black fingernails, turning all that touch them into recently thawed Jimmy Dean sausage, were both hilarious and disturbing at the same time.

[RCMerchant]

The scary little ghost girl...who's very appearance means Death to all who see here,is oooooooone of the creeoiest if not THEE creepiest kid I ever saw in a movie,in Mario Bava's KILL,BABY,KILL.

[BoyScoutKevin]

For me, children make better victims than villains, because they are yet unseasoned in villainies, but, having said that, here are a couple of films, where I found the children to be scary.

"The Lord of the Flies" (the British version)
"The Paperboy" (the title character)

And we should probably mention Patty McCormack in "The Bad Seed" and before her Bonita Granville in "These Three" or Karen Balkin in the remake of "These Three," "The Children's Hour."