Everyone assumes a Capricorn baby arrives pre-serious — the infant who regards a rattle with the detached skepticism of a board member reviewing Q3 projections. And there is something to that read. Your little Capricorn's Cardinal Earth core means they genuinely want to get things right, to establish routines, to feel the satisfying solidity of a world that behaves predictably. But slot a Sagittarius Moon underneath all that, and the picture gets wonderfully complicated.
The Sagittarius Moon is restless, visionary, and runs on feeling — it needs new inputs the way a fire needs fresh air. So your baby is simultaneously the child who wants a consistent bedtime ritual and the one who will shriek with frustration if that ritual doesn't include something interesting to look at on the ceiling. The drive to build something reliable (Capricorn) is in constant low-grade negotiation with the drive to roam and feel everything (Sagittarius). You'll see this as a baby who concentrates intensely, then suddenly abandons a task the moment it stops sparking wonder — not flakiness, but a very specific internal requirement: effort must also feel meaningful.
Because this page links to all twelve rising signs, keep in mind that the rising layer is where strangers first meet your baby. An Aries or Gemini rising will push the Sagittarius Moon's exuberance right to the surface, making the Capricorn core a genuine surprise. A Virgo or Taurus rising will quiet both placements into something that looks much more contained than the fire underneath suggests.