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The child has the exact same expression they had the first time — that whole-face, whole-body delight — and they are looking at you with clear instruction: again.

And you do it again.

And again.

And there is a part of you — the honest part, the part we do not usually say out loud in early childhood spaces — that is slightly, genuinely bored.

I want to say two things about that, and I want to say them in the right order.

First: your boredom is allowed. It does not make you a bad parent or a bad teacher. It makes you an adult who has done this enough times that it no longer carries the element of surprise. That is just physics.

Second: the fifteenth time is not diminished. Not for the child. Not for their brain. Not for what is being built between the two of you. The repetition is not the filler between the good parts. The repetition is the good part.

What the brain is doing

The Center on the Developing Child at Harvard University has spent years documenting what they call “serve and return” interaction: the back-and-forth between a child and a caregiver that builds brain architecture. The child reaches out — a babble, a gesture, a facial expression, a press of a palm into the underside of a blanket — and the adult responds. That response is the return. The circuit between those two moments is the building material of the brain.

Not the novel interaction. The responsive one. The child serves, the adult returns, and the exchange happens again. And again. Each completed exchange builds and reinforces neural connections at the core of emotional health and social skill. The Harvard research is clear on this: it is not word quantity or sensory variety or the sophistication of the materials that drives development in these early years. It is the back-and-forth. The contingency. The fact that when the child does the thing, something responds.

Stanley Greenspan, who developed the DIR/Floortime model of early childhood intervention, described these exchanges as “circles of communication.” Each circle opens when one person initiates and closes when the other responds. In Greenspan’s framework, the goal is to support children in opening and closing more and more circles — increasing both the length and the complexity of the exchange. A circle of communication, by this definition, does not have to be verbal. It does not have to be sophisticated. It can be: child reaches up to touch the blanket. Adult moves the blanket so the touch is felt. Child laughs. Circle closed.

What is the fifteenth tickle doing? It is doing that. Sixteen times.

The child’s brain is not asking: have we done this before? It is asking: does the world respond to what I do? Each time the answer is yes, a circuit is reinforced.

What repetition is for the child

Developmental scientists, including Jack Shonkoff at Harvard, have noted something instructive about the pleasure of repetitive play: when a child keeps wanting to do a thing, the brain is the reason. The brain is saying, in effect, I am mastering this. I am learning from this. I am not finished.

The toddler who does the same puzzle sixteen times is not doing it for the sixteenth time. They are doing it again in the same way a musician runs a scale again — not because the scale is new, but because mastery is built inside the repetition, not around it. The thing they love about doing it again is exactly the thing that is making it mean something.

And there is something else. Predictability is the foundation of felt safety. We talk about this often in the context of classroom routines, of consistent drop-off rituals, of singing the same song at the same moment every day. When the child drops the ball and it makes the same sound, when they press the blanket and it gives the same way, when they crawl around the corner and find you there again — their nervous system learns: the world is coherent. I can count on it. That learning happens inside the repetition, not before it.

What to do with the boredom

First: notice it. It is information. It is not moral failure.

Second: you do not have to perform enthusiasm you do not have. The child does not need your excitement. They need your presence and your response. Those are different things. A warm, quiet, tired return is still a return. The circuit closes the same way.

Third: if you can find something genuine to observe while you’re there, follow it. Not the game itself — you have done the game enough times. But the child inside it. The way their face re-organizes around the delight every time, as if it is not happening from a script. The specific quality of the laugh. What their body does when they are anticipating the thing instead of receiving it. The moment — and this one is worth watching for — when they stop waiting for you to start and start it themselves.

That moment is not decoration. That is information about who this child is becoming.