The essential characteristics of a good interactive storybook are:
1. The book is interesting to children: It should engage children's attention and spark their imagination, making them eager to explore the story further.
2. Illustrations are eye-catching, full color, and realistic: Visual elements play a crucial role in interactive storybooks, enhancing the storytelling experience and helping children visualize the narrative.
3. Pictures vary across pages: Having diverse and engaging illustrations keeps children interested and adds depth to the storytelling experience.
Based on the options provided, the characteristic that is NOT essential for a good interactive storybook is:
4. The story takes a few days to finish: While a story that unfolds over multiple days can be a unique and interesting concept, it is not a fundamental requirement for a good interactive storybook. The pacing and duration of the story can vary depending on the target audience and the intended educational or entertainment objectives.