This is a set of parenting books, "Oyako de Sukusuku," for children who were enrolled in Kodomo Challenge during their infancy. It includes issues for 6 months, 8 months to 1 year and 2 months, along with a guide for potty training. I think the content related to baby food is particularly helpful when raising your first child! ※※Please note the following before purchasing※※ 【Missing issue: 7-month issue】 【Missing/Damaged Sections】 There are a few handwritten notes inside. Also, some monthly cards, which are used to take photos with the baby, are missing or have been cut out and are inserted into the books.