I have a laser pointer that came with a few lenses in a nice little case.
A couple of times I burned a pinhole in some very thin plastic at a few inches.
Even with the glasses, it was still a bit uncomfortable.
It’s sat on the shelf for a couple of years.
The laser seems solid and well built but has some oddball cheapo batteries.
The dollar one I bought actually was in a case with three different interchangeable heads. It was very cheaply made but actually worked just fine. It took A-76 batteries.
I doubt it could have done any damage at all except I did tell him not to point it at anyone’s eyes. It was fun to play with.