All Aboard, Big Sister! is a heartwarming children’s book about Lennon, a curious and imaginative little girl who loves playing with her toy trains. When she learns that she’s going to have a baby brother, she embarks on an emotional journey filled with excitement, questions, and a little nervousness. With the help of her loving family and her trusty train set, Lennon discovers that being a big sister is an exciting adventure all its own. Through playful moments and tender family bonds, she learns that there’s always room for one more on life’s journey—all aboard!