I have found 
A curious friend,
At the end
Of my ball-point pen.
It's a curious button
That you push,
And a red light
Appears in the hush.
It pierces the dark,
And bounces from walls-
It's a moving mark,
And it jitters down the halls!
It reflects from mirrors,
And keys, and silver,
And i can see it behind me,
Reflected almost clearer.
Amazing that it can also write,
And can pierce into the night.
I love truly the "lasered" end
Of my blue, ball-point pen!