A complete 10-volume set for learning science experiments. I purchased the set on Rakuten Books, but my child hasn't read them, so I'm putting them up for sale. They've only been on the bookshelf, but please understand that these are used items that have been handled by others before purchasing. - Series Name: Experiment Showdown Series - Number of Volumes: Complete 10 volumes - Content: Books on science experiments - Target Age: Elementary school students - Language: Japanese Thank you for looking.