Originally posted by: BOARD_of_command
Doesn't the laser have to hit something at the focal point for it to actually burn...? Think of burning CD's for example. It's strong enough to penetrate the plastic and gouge the actual disk, but it doesn't melt the plastic because it's only focused at the point of contact with the actual disk. I've used a very strong laser before and no matter where I placed my hand, I couldn't feel anything.

It damages the eye not because it's hot, but because it's so bright that it damages the sensory nerves inside your eye. Am I wrong about this whole focal point thing?
I believe you're right about that. But if the kid has a magnifying glass or mirrors, couldn't they make their own focal point for the laser?