These are interactive picture books suitable for children aged approximately 3 months to 2 years old, with each book tailored to a specific age range. All books are German-made and purchased in Germany. Generally, the target age range is indicated on the upper right corner of the cover. The condition of the books varies from good to poor. Hygiene tape is applied to the front and back covers to prevent further deterioration and damage. "miau, miau!" has the most damage, but it should still be readable. I believe all of these books will spark children's curiosity.