I found it. The perfect book to read aloud to my two older kids (ages four and six).
Astrid Lindgrin's Pippi Longstocking, Illustrated by Lauren Child.
We've read three chapters and already there has been more giggling and enjoyment from each chapter than any episode of Dora the Explorer. And I do love to hear my Mercy laugh. She has the best giggle ever. It rolls up inside, like she's been holding back until it just bubbles over. Love it.
If you have a four, five, or six year old, you simply MUST go to your local library and get this book!