Bunny Tails: The Day I Became a Big Sister! by Pali Bermúdez

A Heartwarming Picture Book About First Nights Away, Grandparents, and Becoming a Big Sister

Bunny Tails: The Day I Became a Big Sister!

Author: Pali Bermúdez

Illustrators: Anastasia Bankulova

Age range: 2+ years

Year: 2026

This post may contain affiliate links. If you purchase through these links, I may earn a small commission at no extra cost to you.

If you’re a parent, you know that the actual birth day of a second baby is equal parts pure magic and total, unhinged logistical chaos. You’ve got the hospital bag packed by the door, you’re trying to keep your cool, and your toddler is looking at you like, “Wait, you’re leaving ME to go get the baby?!”

That exact, unforgettable day is captured with so much sweetness and humor in Bunny Tails: The Day I Became a Big Sister! by Pali Bermúdez.

If you read our cozy dive into book one, Bunny Tails: Mila’s Big Wish, you know little Mila has been dreaming about becoming a big sister for a while. Well, the big day is finally here! Baby brother Sami is on his way, which means Mama and Papa have to rush off to the hospital, leaving Mila to spend her very first night away from them.

Equipped with a sealed-with-a-kiss pinky promise from her parents and her loving Granny by her side, Mila navigates the long, exciting, and slightly confusing wait for the phone call. From a special sleepover with Grandma to finally walking into the hospital room to meet her tiny new brother, Mila rides the emotional rollercoaster of big changes—discovering along the way that her heart (and her family’s love) just keeps getting bigger.

What I absolutely adore about this second book is how real it feels for modern families. Pali Bermúdez—a Colombian mom, psychologist, and bilingual author based in California—wrote this straight from her own life experience. For those of us raising kids away from our hometowns or extended family, that grandparent connection is absolute gold. The story shines a gentle spotlight on the special bond between grandchildren and grandparents, turning a nerve-wracking first night apart into a cozy, comforting adventure.

Plus, like the first book, it’s available in both English and Spanish (Aventuras de Algodón), making it a total treasure for bilingual homes!

Try this at home or in class

Make a “Pinky Promise Pocket” for Big Transitions.

Help little ones handle their first night away from home or the big hospital stay with a tangible piece of comfort:

Grab a small felt pouch, a cozy little coin purse, or even a decorated envelope.
Cut out a paper heart together and add a splash of your daily perfume/cologne, a tiny paper “hug,” or a drawing of your pinky promise.
Tuck the heart into the pocket for your child to hold onto while staying with Grandma, Grandpa, or a trusted sitter.
Tell them: “Whenever you press this heart, it sends a big hug straight from Mama and Papa at the hospital!”

It gives kids a simple, grounding way to self-soothe and feel connected even when parents are in the labor and delivery room.

Bunny Tails: The Day I Became a Big Sister! is a tender, laugh-and-hug read-aloud that belongs in the hands of every family expanding their crew. It turns the big, scary unknown of baby day into a beautiful celebration of family, growing up, and extra love.