Reddit mentions of Myth-O-Mania

While they're more historical fiction, I absolutely adored the Myth-o-Mania! series by Kate Mcmullan when I was a kid. I credit them with facilitating my interest in antiquity and Greece in particular. For a young reader they are written with enough humor to keep them interested and entertained while also providing an enough baseline information on greek mythology to still be educational.

On a second note, I took a children's literature class in college and decided to my make my final project a lesson plan to make history more interesting for child readers. In many ways I was piggy backing off Dan's approach to tell the 'interesting' side of history.
Inspired by the book Mau5 which I loved reading in high school, I tried to find a chronology of history using graphic novels. I think graphic novels are an interesting way to get children interested in reading, especially when they are so young.

Here is the list of graphic novels. Maybe you will find one interesting. If you want, I can PM you the whole project with my summaries of the books.

Ancient Egypt

Cleopatra- Haggard, H. Rider, Alfred Sundel, and Norman Nodel

Dark Ages

*The Dark Ages and the Vikings-Jeffrey, Gary, and Nik Spender.

Crusades

Crusades-Jeffrey, Gary, and Terry Riley.

Civil War

Gettysburg: The Graphic History of America's Most Famous Battle and Turning Point of the Civil War. Vansant, Wanye

Congo Civil War (Child Soldiers)

Child Soldier: When Boys and Girls are Used in War - Humphreys, Jessica Dee, Michel Chikwanine, and Claudia Dávila.

World War 1

True Stories of World War 1 - Nelson Yomtov and John Proctor

Civil Rights Movement

Malcolm X: A Graphic Biography - Helfer, Andrew and Randy Duburke

The Holocaust*

Maus: A Survivor's Tale* - Spiegelman, Art