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On the heels of announcing the new Echo Dot Kids Edition, Amazon has a new offering tailored to parents who want more convenient, kid-friendly content for their family. The company now offers Prime Book Box, a curated box of two or four children’s books available for Prime members for $ 22.99.

If you’ve dabbled in subscription boxes before, you’ll know how the Prime Book Box works. Prime members who sign up for the new offering will get a box of books shipped to their home every one, two, or three months. Parents indicate the age range of their children to get books that best suit their reading levels—infants and kids up to two years old get four board books, while all other kids from ages three to 12 get two hardcover titles.

The Prime Book Box doesn’t follow rules as strict as some other book subscription boxes. In addition to choosing the frequency of the box, parents can also skip a box whenever they want and choose from a selection of four alternative books if they don’t want one of the books that Amazon selects for their box by default. Amazon curates everything, including the alternative book options, so parents can’t get any book they want, but that’s still a good option to have in case they already own a selected title.