Answer:
The shop seemed to be full of all manner of curious things—but the oddest part of it all was, that whenever she looked hard at any shelf, to make out exactly what it had on it, that particular shelf was always quite empty: though the others round it were crowded as full as they could hold.
"Things flow about so here!" she said at last in a plaintive tone, after she had spent a minute or so in vainly pursuing a large bright thing, that looked sometimes like a doll and sometimes like a work-box, and was always in the shelf next above the one she was looking at. "And this one is the most provoking of all—but I'll tell you what—" she added, as a sudden thought struck her, "I'll follow it up to the very top shelf of all. It'll puzzle it to go through the ceiling, I expect!"
How do the underlined words affect the tone of the passage?
They create a tone of wonder.
