The Happy Man and His Dump Truck, Miryam, illustrated by Tibor Gergely, Little Golden Book, 1950.
I'm an adult but not a grown-up: The title makes me giggle.
Aside from that, this book is a cute little non-story. I didn't buy this book for the text, and I doubt if anyone else does. I bought this book for Tibor Gergely's fabulous illustrations.
The illustrations completely make this book. They are filled with wit and humor, and are downright wonderful.