As he gazed, something bright and small seemed to twinkle down in the heart
of it, vanished, then twinkled once more like a tiny star. But it
could hardly be a star in such an unlikely situation; and it was too
glittering and small for a glow-worm. Then, as he looked, it winked at
him, and so declared itself to be an eye; and a small face began
gradually to grow up round it, like a frame round a picture.
How does the author’s word choice help express the tone of the excerpt?