In "My Sister's Keeper" by Jodi Picoult, the author highlights the profound impact of a child's innocence and joy, emphasizing how a child's smile can leave a lasting impression, akin to a tattoo. This metaphor illustrates the beauty and permanence of those cherished moments, suggesting that such expressions of happiness resonate deeply in our hearts.

Picoult's exploration of familial relationships and the struggles that accompany them is enriched by this sentiment. The idea that a child's smile is "indelible art" emphasizes the significance of capturing and valuing these fleeting moments, reminding readers of the emotional and lasting influence children have on their parents and families.