I remember reading it year ago - perhaps as many as twenty. Martian “children” discovered a Mars lander and destroyed it in their curiosity, drinking the sample solutions, taking it apart to see how it worked, etc. The last line was the parents noticing that there was a manned ship in orbit, and hoping that the children didn’t get ahold of a manned module when it came down, or something like that.
I have a vague association with Ray Bradbury, but it doesn’t seem to be in any of his collections that I own. Anyone recognize it and/or know where to find it?