Pennywise (the creature known as “It”) kills kids because it feeds on fear , and children are the easiest, most “flavorful” source of that fear in Stephen King’s universe.

Core reason: feeding on fear

  • “It” is an ancient, cosmic, shape‑shifting entity that survives by consuming the fear of living beings, not just their bodies.
  • Children’s emotions and imaginations are more intense and less guarded, so their fear is stronger, purer, and easier to trigger.
  • Many fans and readers summarize this as: fear “salts the meat,” meaning the terror makes the kill more satisfying and powerful for Pennywise.

Why specifically kids (not just adults)?

  • Kids’ fears are simpler and more visual (clowns, monsters, the dark), which makes it easy for Pennywise to take a form that directly matches what they’re afraid of.
  • Adults have more complex, abstract fears (bills, guilt, failing in life), which are harder to embody as a monster, so children become the natural primary target.
  • Children are physically weaker and more vulnerable, so they are easier to isolate, stalk, and kill without attracting as much resistance.

The clown form and psychological horror

  • Pennywise often appears as a clown because clowns are already unsettling to many children, giving it a built‑in way to get close and then terrify them.
  • Once children trust or at least approach the clown, It can twist that encounter into their worst nightmare, amplifying their terror before killing them.
  • The prolonged torment lets It “marinate” fear, building it up over time instead of just attacking instantly.

In‑story vs meta (out‑of‑story) reasons

  • In‑story, Pennywise’s pattern of going after kids fits its nature as a predator that optimizes for the strongest, easiest fear with the lowest risk.
  • From a meta, storytelling perspective, many readers point out that targeting children simply makes the villain more disturbing and raises the emotional stakes of the story.
  • Fan discussions often note that kids are also more likely to recognize Pennywise and band together, which is why the story centers on the Losers’ Club as both victims and eventual threat to It.

TL;DR: Pennywise kills kids because It is a fear‑eating cosmic predator, and children provide the most direct, potent, and manageable fear—both within the lore and as a way to make the story more horrifying.

Information gathered from public forums or data available on the internet and portrayed here.