I design children's rooms around the child who lives in them.
My name is Ariana Hernandez. I am an architect and a licensed interior designer in Puerto Rico, with a master's in architecture and a bachelor's in environmental design. I am also a mother, and that is the part that changed how I work.
Before my son was born, I designed spaces the way most designers do. I started with the plan, the palette, the pieces. After he was born, I started watching what he actually did in a room, and I noticed something no mood board accounts for.
A child reads a room before anyone explains it to them.
The body reads the room before the mind does
This is the idea underneath everything I make. Long before a child can tell you a space feels wrong, their body has already decided. The feet that dangle from a chair. The shelf just out of reach. The corner with nothing to hold its back. None of it gets spoken. All of it gets felt, and it shows up as a child who will not settle, will not play alone, will not stay.
Most parents are handed the opposite explanation. The child is too busy, too sensitive, not independent enough. I have found, again and again, that the room was doing something and the child was simply responding to it.
That reframe is the whole work. Read the room before you correct the child.
The research I lean on comes from environmental psychology and neuroarchitecture: how light, scale, layout, and sensory load shape behavior. I did not invent those findings. I apply them at the height of a child.
The method
I work from a framework I developed called OTFC. It names the four questions every child asks of a space, without words.
Own. Is this mine? Scale, territory, and the autonomy to use a space without help.
Tune. Is it too much, or too little? Sight, sound, touch, and smell, calibrated rather than removed.
Flow. Can I move through it? Paths, clearance, and the anchors that hold a zone in place.
Call. Does it invite me to play? Presence, atmosphere, and the silence that lets one chosen thing be heard.
A room that answers all four does not need rules taped to the wall. It works quietly, and the child settles into it.
Tested in a real home, on a real child
Every idea I publish has been used in my own home first, on my own son, in a space that gets played in hard and reset weekly. Not styled for a photograph and cleared before anyone walked in.
That is the standard I hold my own work to. If it does not survive a real Tuesday afternoon, it does not go into a guide.
What I make
The Calm Room Reset. A free fifteen-minute diagnostic for the parent standing in a room that stopped making sense. Three moves: clear, contain, curate.
Field Notes. Short, specific answers to the questions parents actually ask. Light temperature. Furniture heights. What belongs on a wall.
Guides. Longer, illustrated, and built to be used the same day. The first one covers a single play corner in the space you already have.
I also design children's rooms for families one at a time.
Where I work
I am based in San Juan, Puerto Rico, and I work in English with parents anywhere in the world. A room is a room. The principles travel.