How to get siblings to stop fighting by emphasizing maturity

“I want strawberries too!” shouts the older child.

You give her strawberries.

“Her strawberries are bigger than mine!” she yells again, and suddenly a five-second snack moment has turned into a tiny family war.

Most parents see this and think the problem is sharing. I don’t. The real problem is identity. Siblings fight so often because they are comparing where they stand in the family. Who got more. Who got chosen first. Who got praised. Who got the bigger snack, the easier job, the better seat, the louder applause. If I respond only at the surface level, I can stop one argument, but I usually feed the deeper rivalry that caused it.

What has worked much better in our house is emphasizing maturity. When I move a child away from “be fair to your sibling or else” and toward “you are old enough to handle this well,” the energy changes. The child is no longer just defending resources. The child is stepping into a version of themselves they actually want to become. That shift is subtle, but it is one of the most useful parenting levers I know.

About the Author

Jun Loayza is a serial entrepreneur, product leader at YouTube, and the creator of the GRACE Parenting Framework — a behavioral-design approach to raising children grounded in five developmental pillars: Growth, Responsibility, Autonomy, Confidence, and Empathy. He graduated from UCLA in 2007 with degrees in Economics and Philosophy.

Jun has co-founded multiple startups including RewardMe and Untemplater, and has been Yu-kai Chou’s business partner for over 16 years. As a father of three, the GRACE framework grew out of his own daily parenting practice — testing behavioral-design principles on the hardest audience there is: his own kids.

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If a Child Is Acting Out, Give Them Responsibilities

I forgot which book first emphasized this idea, but it has proven itself so many times in our house that I no longer need the citation to respect the truth of it. When a child is acting out, the best cure is often not punishment. It is responsibility.

Whenever our 5-year-old is acting out, we ask her to help with household chores. Whenever our 3-year-old is getting wild, we ask her to help fold towels, carry napkins, or bring something from one room to another. It sounds too simple, but it changes their state fast. They stop behaving like floating consumers of the household and start behaving like people who have a place inside it.

That is why I think responsibility works so much better than many parents expect. Punishment usually says, “you caused a problem, now suffer a cost.” Responsibility says, “you are capable of helping make things better.” One message shrinks a child into reaction. The other grows a child into participation.

From a motivation standpoint, this is close to what Core Drive 2: Development & Accomplishment is all about. Children are energized when they can feel progress, competence, and earned capability. They do not just want comfort. They want a real chance to become someone stronger than they were ten minutes ago.

The same pattern shows up in Self-Determination Theory. Human beings do better when they experience autonomy, competence, and relatedness. Giving a child a meaningful household role touches all three at once. They get to do something, they get to get better at something, and they get to feel part of something larger than themselves.

That matters because children rarely calm down from a lecture about why they should behave better. They calm down when their body, attention, and identity get redirected into something real. A towel to fold is better than a speech. Carrying plates to the table is better than another warning. The nervous system settles when it has a mission.

I also think responsibilities protect dignity better than many punishments do. A punishment often leaves the child with the feeling, “I am the problem in this room.” A responsibility leaves the child with the feeling, “I can still help this room.” That is a very different inner state, and it changes what kind of person the child believes themselves to be.

This is also why I like involving children in real family work instead of treating them like entertainment addicts who need distractions every hour. That lesson is connected to the broader idea in Your kids don’t want to watch TV, they want to work. Kids often look restless because they are under-engaged, not because they need another cartoon. Real contribution settles them because it gives their energy somewhere meaningful to go.

Parents sometimes worry that chores are too heavy a response when a child is melting down. I think the opposite is often true. Many tantrums are symptoms of not knowing where to put all that emotional energy. A concrete job grounds the child. Carry this basket. Wipe this table. Hand me the diaper. Stir this batter. Those actions are small, but they create an immediate sense of orientation.

And there is another reason I like this move. Responsibility teaches a child that they are not just the emotional center of the home. They are one contributor among several. That sounds harsh if phrased badly, but in practice it is reassuring. Children relax when they know they have a role. They stop asking, “how do I get attention right now?” and start asking, “what do I do right now?” That is a much healthier question.

The knife lesson in How to use a knife to teach kids Autonomy and Confidence shows the same principle in a sharper form. The child is calmer and more focused not because the task is safer, but because the task is real. Real responsibility commands presence in a way fake responsibility never does.

“You’re Such a Big Girl”

One of the most powerful compliments I have ever given my 5-year-old is, “wow, you’re such a big girl.” She absolutely beamed when I said it.

That reaction taught me something important. Little kids do not just want rewards. They want identity upgrades. They want to feel themselves becoming more grown-up, more trusted, more capable, more like the people they admire.

That is why simple maturity language can be more powerful than a lecture. When I tell a child, “you are acting immature,” the result is usually defensiveness. But when I say, “I think you’re ready to handle this like a big girl,” I am not only describing behavior. I am inviting identity.

This is where parents often miss the difference between actions and motivations. The behavior we want is sharing, patience, or helpfulness. But the motivation that gets the behavior may be pride, ownership, or the desire to be seen as more grown-up. If I focus only on the action, I become clumsy. If I design for the deeper driver, I get much more leverage. That is exactly the distinction in actions versus motivations.

Think about toddlers for a moment. They follow adults around constantly. If you are folding laundry, they want to fold laundry. If you are cooking, they want to cook. If you are carrying groceries, they want to carry something too. Yes, they make the work slower. Yes, sometimes they create more mess than help. But underneath all of that is a very healthy instinct. They are trying to grow toward competence.

When we repeatedly block that instinct because it is inefficient, we accidentally teach the wrong lesson. We teach the child that real work belongs to adults and that children are mostly there to be managed until later. But when we let them participate, even imperfectly, we teach them that capability is something they can move toward now.

There is also an emotional regulation benefit here. A child who feels herself becoming more capable becomes less desperate for random validation. She still wants praise, of course, but she does not need every moment to prove her worth. That shift is part of what becomes emotional intelligence. She starts learning how to handle frustration, delay, and contribution without constantly collapsing into drama.

The point is not to flatter children into maturity. It is to notice that they already crave it. Our job is to frame daily opportunities so that maturity becomes visible, attractive, and repeatable.

That is why I like language that points forward instead of language that pins a child to their worst moment. “You can handle this.” “I think you’re ready for this.” “Show me how a big sister does it.” Those lines do not deny the behavior problem. They simply place the child’s attention on the version of themselves that can solve it.

Used carelessly, of course, maturity language can become manipulation. If I overuse it, children will feel that too. But when it is tied to genuine trust and real responsibility, it works because it is true. The child is not being tricked into growing up. The child is being shown a real doorway into growth.

You Are Your Sibling’s Caretaker

The best way I know to get siblings to stop fighting is to teach them that they are each other’s caretakers.

When you are changing the baby’s diaper, ask the older child to get the diaper. When the younger child is getting a snack, remind them to get one for the older sibling. When you need to step out of the room, ask the older child to watch over the younger one for a moment. When the younger child is crying, ask the older child to help calm them with you.

These sound like tiny asks, but they reorganize the relationship. Two children who see each other only as competitors will keep fighting over status, resources, and fairness. Two children who are repeatedly positioned as allies start building a different script. They may still fight, but now there is another identity available to them besides rival.

That is why this approach lines up so well with Core Drive 5: Social Influence & Relatedness. Human beings are powerfully motivated by belonging, care, and meaningful social roles. A sibling who feels needed is often a sibling who behaves with more tenderness than you could ever extract through commands alone.

There is also a trust dimension to this. When a parent asks one child to help another, the message is, “I believe you are steady enough to matter here.” That is very different from using the older child as unpaid labor. The point is not dumping responsibility on them. The point is carefully giving them a role that signals confidence in their maturity.

I think of this as a family-scale version of psychological safety. The child needs to feel that helping is safe, wanted, and not a trap. If every attempt to help is criticized, the child will stop helping. If the child can try, wobble a little, and still be appreciated, the prosocial behavior compounds.

Over time these small acts start changing the emotional math between siblings. The older child is no longer just the one who must give things up. The younger child is no longer just the annoying person who gets protected. Each starts seeing the other through a wider lens. That is the beginning of family maturity.

This does not mean the siblings become saints. They will still fight over toys, snacks, turns, and attention. But the baseline relationship changes. Once a child has a few memories of protecting, helping, or comforting the other sibling, the rivalry stops being the only story available. There is another story in the room now, one where they are on the same side more often than not.

What to Do When There Is Sibling Friction

Let’s say your older child does not want to share their snack with the younger sibling. I do not think punishment is the best first move.

Instead, I want to teach perspective. I might say, “Aww, poor thing. Look how sad your little sibling is.” Or, “If you were your little sibling and your older sibling didn’t give you a snack, how would you feel?” Or even, “Oh, I get it. You’re not sharing because you’re a baby.”

Those responses are doing several things at once. They are not just trying to force a snack transaction. They are inviting the child to step into a more mature self-image, to notice another person’s emotional reality, and to decide whether they want to act from that higher place.

If I punish too quickly, the child may comply, but the internal lesson is usually ugly. They may learn that parents are unfair. They may learn that the younger sibling is the protected one. They may learn to hide selfishness better. In the worst cases, repeated control without inner buy-in starts creating a version of learned helplessness, where the child stops developing internal judgment because authority always does the judging for them.

I would much rather help the child reach the insight, “this is what a mature older sibling does.” Once the child owns that identity, the behavior becomes easier to repeat across situations. That is why maturity framing tends to last longer than threats. Threats disappear when the enforcer leaves. Identity keeps working after the room is empty.

This is also why I think empathy and responsibility have to grow together. Empathy without responsibility becomes sentimental. Responsibility without empathy becomes cold. What we want is a child who can understand another person’s experience and still act in a grounded way inside it.

When siblings fight, I am not only trying to stop noise. I am trying to build the kind of household where each child slowly becomes someone who can carry themselves well around other people. That takes reps. It takes language. It takes patience. But it is worth it because the maturity frame compounds for years.

And that is really the whole bet. I am choosing a slower tactic in the short term because I want a stronger identity outcome in the long term. A child who merely obeys in front of me is not the goal. A child who starts seeing themselves as helpful, steady, and older than their impulse is the goal. When that identity lands, the sibling conflict does not disappear forever, but it stops owning the house.

Related Reading

• GRACE Parenting: How to use a knife to teach kids Autonomy and Confidence
• Your kids don’t want to watch TV, they want to work
• GRACE Parenting: I let my daughter scoot to grandma’s house all alone
• The Power of Roleplaying in Children
• The Octalysis Framework for Gamification and Behavioral Design

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