Screen time is usually measured in minutes, which is a shame, because the minutes are the least interesting thing about it. Twenty minutes of a child building something is not the same as twenty minutes of autoplay, and no timer can tell them apart.
Ask what the screen is asking of them
The question worth asking is what the child is doing. Are they predicting, choosing, answering, making? Or are they being carried along? A lesson that stops and expects something of a child is doing different work from a feed designed never to stop at all.
This is also the difference you can see from across the room. Learning looks like a child leaning in, talking back to the screen, pausing to fetch a pencil. Drift looks still.
Four things worth looking for
- It ends. A defined stopping point, not an endless queue.
- It leaves something behind — something made, written or practised off-screen.
- It is made for the age it claims, not merely survivable by it.
- No advertising, and nothing engineered to keep a child watching.
“The best sign of good screen time is that it gets the child off the screen.”
Watch with them when you can
You do not have to watch everything, and nobody does. But a child who can tell someone what they just learned remembers it better than one who cannot, and the simplest way to prompt that is to be in the room and genuinely curious.
Three questions cover most of it. What happened? Why do you think that is? What would happen if it were different? None requires you to have watched closely.
A fair expectation
Two kinds of attention
It helps to know that not all attention is the same thing. Some of it is captured: a bright movement, a sudden noise, a cut every two seconds. It requires nothing of the child and builds nothing. The other kind is effortful — the attention a child chooses to give something, and holds. That is the kind that grows with use.
Content engineered for the first kind can hold a child indefinitely while asking nothing. That is not a failure of the content; it is the content working exactly as designed. It is simply a different product from a lesson, and worth recognising as one.
Why autoplay is the thing to watch
Of everything on a screen, the feature that does the most quiet damage is the one that decides what comes next. A child who finishes something and stops has practised finishing. A child carried into the next thing before the last has landed never gets to.
If you change one setting this week, make it that one. It does more than shortening the limit by ten minutes.
Rules that work better than a timer
- Finish what you start, then stop — a defined end rather than a countdown.
- Screens in shared rooms, not bedrooms, for as long as you can hold the line.
- Something made afterwards: drawn, built, written, told to someone.
- The adult picks what, the child picks when — it gives them real agency over the part that matters less.
Age by age, roughly
Under about five, almost everything depends on an adult being present. Not supervising — participating. A three-year-old watching alone takes away far less than one watching with someone who occasionally says “what do you think happens now?”.
Between five and eight, a child can follow a lesson alone and come back to tell you about it, which is the point at which educational media starts to carry its own weight. The part still worth your attention is afterwards, not during.
From around nine, the useful shift is from choosing for them to choosing with them — and saying out loud why. A child who can articulate what makes something worth watching has a skill that outlasts any rule you set.
The YouTube question
It deserves naming directly, because it is where most children's screen time actually happens. The problem is not the videos; a great deal of what is on there is genuinely good. The problem is that the next video is chosen by a system whose job is to keep watching, and that system does not care what your child is learning.
If you use it, choose the specific thing, watch it, and leave. Treating it as a library rather than a channel is the whole difference.
What the evidence does and does not say
Be wary of anyone — us included — who tells you a precise number of minutes is harmful. The honest position is that quality and context matter more than duration, that what a screen displaces matters more than the screen itself, and that an hour taken from sleep or from being outside costs more than an hour taken from a quiet afternoon.
That is less satisfying than a limit. It is also more useful, because it tells you what to look at in your own house rather than what to measure.
And when it is simply the right answer
Sometimes you need twenty minutes. A call you cannot move, a sibling who needs both hands, an evening where everything has gone wrong. Using a screen then is not a failure of parenting, and the guilt attached to it does nobody any good.
What helps is having decided in advance what goes on in that twenty minutes, so the choice is made on a calm day rather than a bad one.
Good educational media is not a substitute for a person, and anyone who tells you otherwise is selling something. It is a way to introduce one idea clearly, so the adult in the room can spend their attention on the part that needs them — the questions, the practice, the stuck moment.