What metaphors are used in Tuck Everlasting by Natalie Babbitt?

Examples of Metaphors:

“A dragonfly, a brilliant blue jewel, darted up and paused over the lily pads, then swung up and away.”

“Mae sat there frowning, a great potato of a woman with a round, sensible face and calm brown eyes.”

". . . but now this morning, they were careful with her, a little gingerly, as if she were an egg.”