This charming picture book, despite being labeled a 'chapter book' for 24 pages, offers a gentle and heartwarming look at sibling interaction and imaginative play during bath time. Peter, the older brother, introduces his baby sister, Abby, to his favorite game of pretending to be invisible in the tub. The narrative beautifully captures the simple joy of shared moments and the special bond between siblings as they grow and learn to play together. It's an ideal read-aloud for younger children, providing comfort and normalizing the fun of everyday routines. Parents will appreciate its quiet warmth and the positive portrayal of sibling relationships. It's a lovely choice for a bedtime story or for children who are adjusting to a new baby in the family.