Help with these books, please

HI,
I bought this book as part of a set to help me improve my reading skills. I have ten different books, from 1 to 12.
They seem to be children's stories, and it's hiragana only.
They have no ISBN number, and I would like to know more about them, please.
Thanks for reading!

キンダーメルヘン (the series: googling it these appear to be for 3-4 year olds)

さいころ きょうだい (title: you should be able to figure this out with a dictionary)

文 おかとふみ 絵 せべまさゆき (name of author and artist for the book)

The usual notes on these sort of books apply: they're intended for native-speaking children (and if they're kindergarten level then probably for reading with the assistance of an adult). Although they'll give you some kana-reading practice, the grammar and vocabulary won't be aimed at a second-language learner, and all-kana is actually more difficult for a beginner to Japanese to parse.