Consumer app founders: what was the tiny, specific moment that made you say "I have to build this"?

Mine for Lunia (AI bedtime stories): my kid asking the same monster-under-the-bed question for 3 weeks straight while every personalized story app just swapped her name into a generic dragon plot.

The mismatch broke something in me.

What's yours? Especially curious about the tiny, specific moment that made you commit, not the polished origin story version.

Drop yours below.