Only on IMDb would some say 'yeah he killed his own little brother and a dog, but' I mean honestly, what the hell do they expect? If he just went around killing people over and over itd get boring and would lose the impact when he finally does something evil. This one has a slow build up, and I was glad they didn't rush the evil deeds he did. It was a perfect mix of creepy and thrilling, and is still entertaining all these years later.

He failed to kill his sister because the people got her out of the water. She was very close to dying. He didn't kill his mother because she managed to hold onto the rocks and pull herself back up. He tried to kill the people in the car pileup, not his fault they lived.
How are those his fault? He definitely tried.
Henry did manage to kill his little brother.
To me he really was a sick bastard.
Great movie.

I personally think Henry wasn't evil enough. I know it was more of a thriller than a horror film, but I thought they held back and Henry wasn't as evil as he could've been. He failed to kill his sister, he failed to kill his mother, and no one died in the car accident he planned. It seemed like he just wanted to do a bunch of stuff and then failed at it all. He did kill his little brother and the dog but I feel he could've done more. He didn't do quite enough damage for me to truly despise him. I thought the film could've gone a bit further and make me hate Henry more so I would want to root for Mark.
Overall, I gave the film a 7/10. It's an okay movie but the killer kid story has been done a lot better.

I am guessing the low score is due to the obnoxiousness of the child star Culkin.