this movie scared you as a child/adult. When I was little, The Watcher in the Woods was constantly on the television. And no matter how many times I saw it, it scared me. Something about Bette Davis's creepiness gives me the chills even now. (Although NCIS junkie that I am, I can now enjoy the incredibly young David McCallum aka Duckie)
Honestly, it's hard to believe this is a Disney movie. Disney is so toothless anymore. But if you need a Halloween movie that is spooky without being gory, this is it. (I know I mentioned this in passing last year, but it really does deserve its own Hump Day post.)
The trailer is available on youtube here:
If you want something more modern this Halloween, try Monster House. It's a little intense for really young children, but it has lovely animation and lots of heart.