Children's Books discussion

Are there any children's books out there that focus on collecting something?

I found these titles doing an Amazon search. I have not read any of them though.

PICTURE BOOKS

Junk Collector School
Frédéric
Collecting Seashells: A Childs Magical Adventure
Rhoda's Rock Hunt
Max's Words
The Boy Who Loved Words

LONGER FICTION/NONFICTION

Canned
The Plant Hunters: True Stories of Their Daring Adventures to the Far Corners of the Earth
Johnny's in the Basement
Mr. Karp's Last Glass
The Glass Inheritance
The Dragon in the Cliff: A Novel Based on the Life of Mary Anning (early British fossil collector, the book is pretty good)
Pets in a Jar: Collecting and Caring for Small Wild Animals
The Giants and the Joneses (this sounds interesting, sort of a continuation of Jack and the Beanstalk, about a young giantess who collects three children)
Postmark Paris: A Story in Stamps
Brendan Buckley's Universe and Everything in It

Not a story about collecting, but Ashley Bryan's Puppets: Making Something from Everything is a book of poems and photographs of "puppets" made from collected junk. There are notes about the collecting and recycling of the materials in the foreword and afterword.

A chapter book suitable for about 2/3 grade that I like is Donavan's Word Jar.