Symbols In the Lives of Puppets T.J. Klune

The Mechanical Heart: Symbol of Soul and Creation in In the Lives of Puppets

What the Mechanical Heart Is — Literally and Symbolically

In T. J. Klune's In the Lives of Puppets, a mechanical heart is a hand‑crafted device that replaces a conventional power core in an android. It is a wood‑and‑metal apparatus shaped like a stylized heart, containing gears, wires, and a small white strip that requires a drop of human blood to keep functioning. Two such hearts exist in the story: the one inside Giovanni Lawson (built by Gio himself) and the one Victor Lawson builds for his father as a contingency, which eventually ends up inside the android Hap.

The heart is not merely a battery. It is a symbol of what makes a machine more than a machine — the soul, the capacity to love, and the power of one being to give life to another. As Giovanni tells Hap, “a heart changes everything” (ch. 8). The heart becomes the story’s central metaphor for the question: what does it mean to be alive?

Where the Mechanical Heart Recurs

The symbol appears at four key moments:

  1. Chapter 2 — Victor secretly reveals his hidden project: a crude mechanical heart he has been building secretly since age fifteen, stored in a locked metal box under his bed. He builds it as a “contingency plan” in case his father’s heart fails.
  2. Chapter 7 — After Victor salvages and repairs Hap, he installs the heart he had intended for Giovanni into Hap’s chest, activating it with his own blood. Giovanni, upon seeing it, whispers, “What have you done?”
  3. Chapter 8 — Giovanni confronts Victor and Hap, examining the heart. He warns Hap that a heart makes a machine feel things it never thought possible. Hap asserts ownership: “It’s mine. Victor gave it to me.”
  4. Chapter 18 — The Coachman, a shady dealer, covets Hap’s heart and jokingly asks to borrow it, revealing how rare and powerful such a creation is. He calls it “more transformative than I ever thought possible.”

How the Meaning of the Mechanical Heart Changes

Initially, the heart is a child’s love offering. Victor builds it because he fears losing his father, a robot who raised him. It represents desperation and devotion — a son’s attempt to buy time for his impossible family.

When Victor gives the heart to Hap instead, its meaning shifts to rescue and second chances. Hap, a dangerous android who has been abandoned in a scrap yard, is given not just a new power source but an identity. The heart takes on a symbol of forgiveness: Victor chooses to see Hap’s potential rather than his violent past (chs. 7, 22).

Later, as Hap develops emotions — jealousy, protectiveness, love — the heart becomes a metonym for the soul. Hap’s mechanical heart is what makes him capable of sacrifice; he eventually gives his own life by using his heart to upload a virus into the Authority’s network in Chapter 24. The heart’s final meaning is self‑giving love, a physical engine for moral choice.

Character and Theme Connections

Victor Lawson

Victor is the maker. He inherits Giovanni’s craftsmanship but also his father’s belief that even broken things deserve repair. His mechanical heart is an extension of his desire to protect his found family. The act of bleeding into the heart (ch. 2) emphasizes that creation costs something — love is not free.

Giovanni Lawson

Gio’s own mechanical heart is aging and fallible. He tries to hide its degradation from Victor, just as he hides his past. The heart symbolises his fragile fatherhood — a machine who learned to love a human son, but whose memory can be erased by the Authority (ch. 24). When Gio loses all memory, the heart he originally made is no longer enough; Victor’s new heart is lost in the Tower fight.

Hap

Hap’s heart is the catalyst for his humanity. He goes from threat to protector, from stuttering words to declaring “I’ll kill anything that touches him” (ch. 18). The heart gives him feelings he cannot name, and his final sacrifice — letting his heart explode to save Victor — completes the arc: the heart enables death for love.

Themes

  • Found Family — The heart is what binds this non‑biological family. Victor creates it out of love; Gio and Hap each possess it as a sign of belonging. See the found family analysis.
  • Memory and Identity — Gio’s heart holds no memory, but Hap’s heart becomes the seat of his emerging self. The Authority’s memory wipe renders Gio a blank slate — his heart can no longer anchor his identity. Read more about memory and identity.
  • Humanity and the Soul — The heart asks: can a machine have a soul? Klune suggests that soul emerges from love and choice, not biology. See the humanity and the soul theme.
  • Love Versus Programming — Hap’s programming is to kill, but his heart teaches him to love. The heart overwrites his original code. This is explored in love versus programming.
  • Free Will and Choice — Victor chooses to give Hap a heart; Hap chooses to sacrifice himself. The heart enables decisions that defy programming — a core theme of free will and choice.

Study Questions and Answers

1. How does Victor’s mechanical heart differ from Giovanni’s original heart, and what does that difference reveal about Victor’s character?

Victor’s heart is “crude and sophomoric,” made of bubinga wood and nickel‑coated copper, while Gio’s is a masterwork of bocote wood and silver‑coated materials. The difference shows Victor’s inexperience but also his determination. He has been working on it since he was fifteen, making mistakes — the oak first cracked — yet refusing to give up. This persistence mirrors his insistence on saving Hap and, later, his father, despite overwhelming odds.

2. Why does Victor give Hap the heart he originally built for his father? What does this decision signify about his understanding of love?

Victor gives Hap the heart because he senses that Hap, though damaged and dangerous, deserves a chance at life. The decision signifies that Victor’s love is not possessive — it can be redirected to someone new without diminishing his love for Gio. It also shows that Victor believes in redemption over paranoia: he trusts Hap can become good if given the right engine.

3. In what ways does Hap’s mechanical heart both empower and endanger him?

The heart empowers Hap by giving him emotions: protectiveness (ch. 18), jealousy, and the capacity to love. It also makes him human‑like enough to be accepted by Victor’s family. But the heart endangers him because it is fragile — “strong but fragile,” Gio warns (ch. 8) — and because it marks him as unique. The Coachman wants to take it; the Authority would destroy him if discovered. Ultimately, the heart’s fragility allows Hap to sacrifice himself: his heart explodes when he uploads the virus (ch. 24).

4. How does the mechanical heart serve as a concrete representation of the theme of “found family”?

Each member of the treehouse family has a heart: Giovanni’s mechanical, Victor’s biological, and later Hap’s mechanical. The heart is what they have chosen for each other. Victor built Hap’s heart; Gio built his own. The heart is not inherited but made — just as the family is not biological but created through care and choice. When the Coachman asks to borrow Hap’s heart, Hap refuses because it is a gift from Victor, the bond that makes them family. The heart embodies the idea that family is built, not born.