♡ Thank you for viewing! ♡ This is a set of Volumes 1 and 2 of the "Z-Kai Grade Up Problem Collection" for elementary school students. With plenty of illustrations and diagrams, the content is designed to be fun and engaging for children. It's perfect as a learning material for your child. Brand new and unused, in beautiful condition, only stored at home! * Please note that there may be minor oversights due to home storage and amateur inspection. * Please check the condition in the photos. ♪ Please use it to help your child improve their academic skills ♪ We look forward to a wonderful connection!