Children

But I remember what my Uncle Ajax used to say. 'Children,' he said, 'are not strictly speaking animals at all.  They're not grown-ups, either.  More like some kind of very active bug.  A bug with a habit of making loud noises that don't mean anything.  But you can get along with them if you forget how funny they look, and if you remember to treat them as if they had a lot of sense.  That, of course,' Uncle Ajax said, 'is important in dealing with grown-ups, too.  In fact, 'he said, 'although in theory kids and grown-ups are different species, in practice there ain't enough difference between 'em to fill the hole in a doughnut.'

Freddy and the Baseball Team from Mars by Walter R. Brooks