A boundary mistake almost every well-meaning parent makes

A mother once told Dr. Becky Kennedy a story from her playroom. Her two children had been building an elaborate scene of trucks and blocks, until an argument broke out over where a piece should go, and one child started throwing figures at the other. "Stop throwing right now!" the mother said. Her child kept throwing. Another figure. Then another.

Kennedy's response to this story reframes what most parents assume is happening. Nothing is wrong with this mother, and nothing is wrong with her daughter. What happened is that a boundary was never actually set. Kennedy makes a distinction that reshapes how she thinks about discipline: boundaries are not what we tell kids not to do, they're what we tell kids we will do. "Stop throwing right now" asks a dysregulated child to control herself using a skill she doesn't yet have. "I won't let you throw these toys," paired with moving the toys out of reach or picking the child up and leaving the room, is something else entirely: a boundary a parent actually enforces with their body and their presence.

This distinction rests on an idea Kennedy borrows from neuropsychiatrist Daniel Siegel and psychotherapist Tina Payne Bryson, authors of The Whole-Brain Child. They describe the brain as a two-story house. The downstairs brain, responsible for raw emotion and impulse, is fully wired in young children. The upstairs brain, responsible for planning, self-awareness, and regulation, is still under construction well into a person's twenties. A parent's job, in this analogy, is to act as the staircase, gradually connecting the two, rather than expecting a four-year-old to summon an upstairs skill she doesn't yet possess.

Kennedy argues that every family member has a job, and confusing those jobs is where things break down. A parent's job is safety, through boundaries, validation, and empathy, in that order: contain the danger, then acknowledge the feeling, then try to understand it. A child's job is to explore and to feel, sometimes messily. When a parent tries to do the child's job by demanding they stop feeling something, or a child tries to do the parent's job by dictating the rules, the whole system gets confused. Sturdy leadership, Kennedy insists, doesn't require raised voices. It requires knowing exactly which job is yours to do.

This week, catch yourself the next time you're tempted to say stop, and try converting it into a sentence about what you will do instead, paired with an actual physical follow-through, like moving your body between two arguing siblings or picking up the scissors. When things are truly unsafe, resist the pull to lecture or reason in the heat of the moment, and focus entirely on keeping everyone's body safe first. Once that's handled, go back and name the feeling that was driving the behavior, so your child knows the feeling itself was never the problem. You are, quite literally, the staircase between your child's big feelings and the calmer part of their brain that won't be finished for years.