10 Big Sister and Brother Books of 2025

“You’re The Biggest” is an outstanding book for big sisters- or brothers-to-be. The short story is about two adorable foxes. The biggest is discovering what it means to be an older sibling. Every page includes colorful illustrations without too much text, which is great for toddlers and preschoolers.

We love how wonderfully adorable the book is and found it just right for our firstborn kiddos.

We especially appreciated the blank space at the front of the book. This spot is for a personal message for your firstborn. You can write a comment from you or as a greeting from the new arrival.

For big sisters-to-be, “I’m a Big Sister” by Joanna Cole makes a fantastic addition to the bookshelf. The book was first published in 1997, but its illustrations and text make it timeless.

The story revolves around a little girl who has a new baby in the house. As you go through the pages, she’ll compare what she and the baby can do. More importantly, she also talks about how special she is to her mom and dad, even with the new baby here.

Parents love how positive the story is and the colorful images that go along with it. A similar version is also available for big brothers. The book is suitable for ages 4 to 8 years; however, we find it to be best for toddlers and preschoolers.

Parents know firsthand how hard life with a newborn can be, and it’s good to prepare the big sister or brother. “The New Baby” is all about explaining the real expectations of having a newborn, with some fun in between.

In the story, we follow Little Critter as his baby sister arrives. Throughout the book, he helps take care of his sister, including diaper changes, rocking her to sleep, pushing the stroller, and tickling. It’s all the things that older siblings can help out with.

Because it’s a Mercer Mayer book, the illustrations are quirky and adorable. The book’s many colors make it attractive for preschoolers. Our kids especially love hunting for the cute little mouse character on each page.

When little boys become big brothers, they may need some extra TLC to adjust. The book “I Am a Big Brother” will help provide just that as parents cuddle and read this to their boy.

It’s a loving story of a boy who becomes a big brother and how he adjusts to his new role in the family. The boy expresses how happy he is about the new arrival and helps out when he can. He talks about the fun tasks and even the less pleasant ones, such as diaper changes.

The vibrant illustrations emphasize the sweet tale, and the rhythmic text makes this book a wonderful choice for toddlers and preschoolers.

Our toddlers love Daniel Tiger, so we thought this would be a fantastic book to introduce a new little one. It’s a book version of an exceptional episode of Daniel Tiger’s Neighborhood, in which Daniel becomes a big brother.

In the story, we get to follow Daniel Tiger as he’s learning what it’s like to be an older sibling. He’s happy and excited to help take care of his baby sister Margaret, but sometimes, big brother needs a hug, too.

The book is just as wonderful as the series. Each page has minimal text, which is ideal for keeping the attention of small children, and it deals with situations and feelings young children are likely to experience.

Not every day is sweet and problem-free with a younger sibling, and this Little Critter book touches on that. “Just Me and My Little Brother” is about Little Critter thinking of all the things he and his little brother will do. However, along the way, he discovers that sometimes they’ll fight, and he may have to compromise.

The book isn’t every parent’s cup of tea, but we love it. It’s not all about the sweet things, and it touches on some real-life issues. Fortunately, they are resolved in ways that preschoolers can understand.

As every mother knows, those nine months of pregnancy can feel like years, so imagine what it’s like for a preschooler. “Hello in There!” is all about the wonders of waiting for a new sibling to arrive.

In the book, we follow a young girl who’s so excited about her mom’s pregnancy that she starts her big sister duties early. Through the belly, she sings songs, explains things on the outside, and much more. It’s a breezy story with a good flow and gentle humor parents can relate to.

Some of the pages include flaps to flip and lots of fantastic drawings. Although the story is about a girl, the book is also suitable for boys.

If you’re expecting twins, the surprise ending in “God Gave Us Two” will fit right in. The story is about a sibling-to-be’s worries as their mother is waiting for baby number two (and three).

The little cub will ask heartwrenching questions, including “Will you forget me?” and “Why do we need a new baby?” The parents reassure the little cub of their unchanging love.

The story is gentle and suitable for both boys and girls. The polar bears and their snowy home make it extra special for winter babies.

In “What Sisters Do Best,” you get to read a story about what big sisters can do. Big sisters can teach how to ride a bike, swim, climb a tree, or start a game of tag. Most importantly, big sisters will be there when their younger sibling needs them.

The book celebrates sisterhood in the most adorable, lovable way possible. Plus, the intriguing illustrations make it irresistible to toddlers.

“My New Baby” is a sweet story of an older sibling’s curiosity toward the baby. What do babies smell like? When will they walk, and what do they like to eat?

It’s a whole new experience for the firstborn.

Throughout the story, you follow siblings-to-be as they look forward to the new arrival with both happiness and worry. It gives a realistic look at what’s to come with vibrant colors, illustrations, and simple text. It’s suitable for preschoolers and young children aged 5 years and up.