During a child’s cognitive, emotional, and social development, the so-called “terrible twos” are known as the specific stage during which children seek to assert their independence and test the limits of the rules set by their parents and the adults around them.
In fact, this phase, which generally begins around 18 months and can last until age 3 or 4, is marked by strong resistance to parental authority and behaviors such as tantrums, refusal, bargaining, and so on.
Here is a selection of 15 ways children test their parents’ limits.
1. Get into trouble
When a child deliberately misbehaves in front of an adult, they aren’t just trying to provoke a reaction—they’re communicating.
This behavior, which is often confusing for parents, is actually a way of exploring the social world. The child closely observes the adult’s reaction to understand boundaries, consequences, and the consistency of rules.
It is a way of learning how authority works, what is and isn’t allowed, and how their actions influence their environment. Behind the “misbehavior,” there is therefore a need for experimentation and guidance.
2. Throwing tantrums or having meltdowns in public
Throwing a tantrum or acting out in public is one of the most common ways for children to test their parents’ limits.
The child instinctively compares their parents’ reaction at home with how they’ll react when others are watching.
They’re trying to figure out if the rules stay the same, even when the situation gets uncomfortable for the adult. This behavior isn’t manipulative—it’s social exploration.
The child observes, experiments, and checks the consistency of boundaries. What they need is a stable framework, even in the middle of the supermarket.
3. Practice the rules at home and at school
Testing a rule at home and then at school is a very common strategy among children. They compare adults’ reactions in two different settings to understand what is truly non-negotiable and what varies depending on the context.
By observing which boundaries are more flexible or stricter, they naturally adjust their behavior. This isn’t provocation—it’s a process of social learning.
The child seeks to identify consistency, to understand how rules work, and to find their place within each setting. This is how they build their own internal compass.
4. Lying
Lying in children is obviously a behavior that needs to be guided, but it also deserves to be understood. Lying is not just a transgression; it is an important stage in social and cognitive development.
Children experiment, test reactions, and observe consequences. Among the most common reasons is the need to test boundaries and understand how far they can go before an adult intervenes.
Lying then becomes a tool for exploration, a way to decipher the rules and learn how authority relationships work.
5. Using profanity or bad language
Using swear words or “forbidden” language is a very common way for children to test boundaries. They know these words provoke an immediate reaction and are trying to understand why they’re off-limits.
By saying them, the child explores the power of language: what shocks, what amuses, what angers. They closely observe the adult’s response to grasp the consequences and gauge the strength of the rule.
This behavior is not a sign of poor upbringing, but a stage in learning social norms.
6. Interrupting adults' conversations
It’s very common for children to interrupt adult conversations or raise their voices to be heard.
This behavior isn’t a sign of disrespect: it’s an attempt to make their presence felt in a space where they momentarily feel invisible.
By acting this way, they are testing social rules: Is it okay to speak when grown-ups are talking? How far can they go to get attention?
They’re also observing adults’ ability to maintain structure, even in the presence of others. Behind the interruption lies a need for recognition and guidance.
7. Ignoring instructions
Ignoring an instruction isn’t necessarily a sign of defiance; it’s a normal stage of a child’s development.
On the surface, they “aren’t listening,” but in reality, they’re exploring how the rule applies and testing the strength of the boundaries set by the adult.
It’s also a way for them to assert their independence, to see if they can make their own decisions or if the boundary remains firm.
In these moments, consistency is key: a rule applied in a stable and predictable way reassures the child and helps them understand what is expected of them.
8. Saying no to everything
The famous “no to everything” phase is a perfectly normal stage in a child’s cognitive, emotional, and social development.
By systematically refusing, the child isn’t trying to be defiant—they’re asserting themselves. They’re discovering that they are a separate person from their parents, with their own desires, their own choices, and the beginnings of independence.
Saying “no” then becomes a tool for testing boundaries, understanding what is negotiable, and gauging their power to act. It is an essential phase for building their autonomy and inner confidence.
9. Refusing to eat
When a child consistently refuses to eat what their parents offer, they aren’t just trying to make mealtime difficult.
It is often a way to assert themselves and test boundaries at a time when the whole family is together. Mealtime then becomes a testing ground: the child observes the adults’ reactions, checks the strength of the boundaries, and seeks to understand the limits of their autonomy.
This very common behavior reflects a need for attention and control over a small part of their daily life. A calm and consistent environment helps them feel secure.
10. Persist after an initial refusal
When a child insists on getting something after an adult has already refused, the child isn’t just trying to “wear down” the parent: the child is testing the firmness of the decision.
By repeating their request, they observe whether the adult remains consistent or eventually gives in under pressure. This persistence helps them understand adult perseverance, the consistency of rules, and the value of a “no.”
This behavior is a normal exploration of boundaries. A calm and steady response helps the child understand that certain limits do not change, even in the face of persistence.
11. Negotiate
When a child tries to negotiate a rule, they aren’t just trying to gain an advantage; they’re assessing how strict and important that boundary is.
By proposing a compromise or making an argument, they observe how consistent adults are and check whether certain rules can be relaxed depending on the context, particularly during outings or specific social situations.
This process is part of their learning: understanding what is non-negotiable, what can be adapted, and how adults maintain the framework.
Negotiation then becomes a tool for structuring their thinking and autonomy.
12. Not sticking to a bedtime routine
The bedtime routine is a crucial anchor for a child—a moment that marks the end of their day and helps them feel secure. Yet it’s very common for them to resist or get upset when it’s time to go to sleep.
This behavior isn’t just a whim: it often reflects a need to test boundaries, delay separation, or regain a little control before falling asleep.
By resisting, the child tests the consistency of the structure and the adult’s ability to maintain a stable routine, even in the face of opposition.
13. Pretend not to hear
Pretending not to hear an instruction is a very common tactic among children, and there’s nothing alarming about it.
On the surface, they “ignore” the rule, but in reality, they are testing the limits of the boundaries and trying to figure out how much leeway they have.
This behavior allows them to assert their independence while observing whether the adult stands firm or softens in the face of resistance.
It’s a subtle way to regain a bit of control over the situation. A calm, consistent, and steady response helps them gradually internalize the rule.
14. Refusing to follow or trying to change the rules of a group game
Children often fail to follow the rules of a game or try to change them as they go along.
This behavior isn’t simply a refusal to follow instructions: it’s a way for them to assert their individuality within the group.
By trying to impose their own rules, they test the boundaries set by adults and observe how others react to their initiative.
It is also a way to explore social dynamics: understanding what is acceptable, what is not, and how to fit into a group while remaining true to themselves.
15. Asking one parent for something when the other has already said no
One of the most common strategies children use is asking one parent for something after the other has already said no—it’s a classic move.
This behavior isn’t calculated manipulation: the child is simply testing parental consistency and checking whether the rule holds, no matter who they’re asking.
By comparing their reactions, the child observes whether one parent is more flexible or more firm, and how far they can push before the boundary is reaffirmed.
A consistent response from both adults reinforces the boundaries and reassures the child.