Yeah. He's a kid. Kids are stupid.
5 seconds sound clip from the Home Alone (1990) movie soundboard.
You can hear this line at 01:15:37 in the Blu-ray version of the movie.
Quote context
[...]
- This is my house. I have to defend it.
- Okay, we'll check it out first. We can always come back for the truck.
- We'll go to the back door. Maybe he'll let us in. You never know.
- Yeah. He's a kid. Kids are stupid.
- This is it. Don't get scared now.
- Merry Christmas, little fella. We know that you're in there... and that you're all alone.
[...]