How to create a childrens book about a specific event or time in the life of Frederick Douglass?

My teacher told me to create a children's book about a specific event or time in the life of Frederich Douglass. Can you please help , i have no idea what to do ! I need a specific event in his life. !!!

Answer: 
Why not base your book on his account of how he learned to read and write? As I recall, his owner's wife began teaching him but stopped when her husband objected; then he got the white boys whom he hung out with to pass on to him what they were learning in school. Of course, one major feature of children's books is the illustrations. If you have some artistic ability, you could draw and paint pictures of young Frederick being taught by the mistress, of his white friends showing him things, and maybe of the mature man writing at a desk.