Here's a super-useful worksheet on brainstorming story topics. Students think about broad, thematic questions. Then they put their ideas into graphic organizers. This is a great way to start a unit on narrative essays.
Based on the readability scores for this text, Brainstorming Story Ideas Worksheet is recommended for students reading at grade levels 3 - 7. This text should be accessible to any student reading at a 3rd grade reading level or higher.