You could use a Book Creator APP for Apple and for Android here.
What to do:
"Book Creator is open-ended, creative and cross curriculum, and is one of the most popular apps for teachers across the world."
How about you use this app for students to test how much they have mastered a topic.
Students could collaborate — writing, designing, illustrating, editing — on a children’s book that explains a concept in easily graspable text and images.
Assessing an audience and figuring out how to simplify a complex topic requires higher-level thinking and demands a true understanding of a topic.
Older students could collaborate with primary teachers to produce books for the younger classes, and could even visit those classes to read to the younger students.
(Idea from here.)
Variations:
Create, HOW TO BOOKS.
For more ideas click here.
Click here for some instructional YouTube Video clips.