It’s called Kids of Courage and is appropriate for children.
“Kids of Courage materials convey the struggles endured by persecuted Christians without including graphic descriptions or photos, or age-inappropriate concepts. Nevertheless, parents and teachers are encouraged to preview the materials before sharing them with their own children, as they know their children best.”
Free Bold Believers activity books in the Downloads section of the Kids of Courage site provide information about many unique subjects. (See Sample Pages here. Note: You will need to register at the site for the free downloads.)
Hope this helps!