Z-Kai 1st Grade Experience 2023 Edition May - March, 11 books - Number of books: 11 - Title: Experience - Year of publication: 2023 Thank you for viewing. This is Z-Kai's "Experience" for 1st graders. The content is designed to cultivate basic knowledge of science and social studies through experience. All books have been used, so there may be some writing in them. Would you like to try them? Please refrain from purchasing if you are concerned about the condition. Thank you.