In a Performance Presentation, you focus on your work. The students in your audience will be interested in how your work has changed and evolved. They'll want to know about your creative process. You may decide to show them how a character develops from early sketches to the finished product. Choose a particularly exciting part of your book and read it to them.
Stories come alive when they're read, especially by their creators.
If you're an illustrator, the audience can help you create a character. Take suggestions from the students and draw on an easel in front of the group. Sign the finished product and leave it for the school as a souvenir of your visit. The Performance Presentation lends itself well to slides or videos. Make slides of your book.