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Start with the whole Parent Play Style hub for everything in this cluster.
See the hubWatching a football match with your child works best in short bursts, not a full ninety minutes.
I used to sit my son down for a whole match assuming that was just what watching football together meant, and I spent most of it re-explaining offside to someone who had wandered off to find the dog eight minutes in. A few short bursts built around the moments that actually mean something work far better, and there are a handful of simple things worth pointing out that connect straight back to the garden.

Watching football with kids, honestly
Most 5 to 9 year olds do not have the attention span for a full football match, and that is not a failing on their part or yours. Ninety minutes plus a half-time break plus stoppages is a long stretch of mostly slow build-up play for an adult audience, never mind a child who has been asked to sit still and pay attention to something they cannot yet read tactically.
Trying to force a full match teaches a child that watching football together is boring, which is the opposite of the point. Better to be honest about the running time and build the evening around short, high-attention bursts rather than pretending a young child owes the whole ninety minutes of focus.
What to look for when watching football with a child
You do not need ninety minutes of commentary. Three short windows do almost all the work.
The first few minutes. Kick-off itself, and the first time either team gets close, is short, high-attention, and easy to narrate without losing anyone.
Any goal, whoever scores it. The celebration is the part a young child actually connects with, more than the buildup that led there.
The last five minutes. A short, tense stretch that is easy to follow even cold, and a natural point to switch off once it ends.
Watch those three windows properly, together, and let the rest of the match run in the background if it runs at all.
One study, honestly hedged
A UK focus-group study of 36 people, 18 parents and 18 children aged 6 to 9, looked at families taking part in a family football programme. It found that both parents and children valued shared football time itself, and that children found a parent's involvement meaningful in a way that felt different from other sports where parents usually stand back (Fothergill, Gill & Graham, 2024). Read the study on families in a football programme.
That study is about families playing football together in a structured programme, not about watching a match as spectators, so it supports the general point that shared football time matters to children this age, not proof that watching alone improves how a child plays.
See how Our Kickabout researches its pages.
When attention runs out
Boredom halfway through is not a failure of the activity. It is a sign the burst has run its natural length. Let them go and play with the ball themselves for a bit, which is arguably the better half of the evening anyway.
Once they are back out there, What to Say During Play has the words for keeping that moment going without turning it into a lecture.

Quick answers
Most 5 to 9 year olds do well with three short bursts, a couple of minutes each around kick-off and any goal, plus the last five minutes at the end. That adds up to about ten minutes of properly focused watching rather than a full ninety.
The honest answer is it is not proven either way for watching specifically. What the evidence does show is that for six to nine year olds, the age range the cited study covered, shared football time is something both children and parents value in itself.
That is normal, not a failure. Let them go and play with the ball instead, which often teaches more than the rest of the match would have.
Keep going
Three places to go next, depending on what your evening actually needs. And if the video game is the favourite, a child who prefers FIFA to real football shows how to bridge the gap. When you are ready to go in person, a first live football match with your child has a simple plan. And what a corner and a goal kick are is handy before the whistle.
Start with the whole Parent Play Style hub for everything in this cluster.
See the hubWhat to Say During Play has the scripted language for once the ball is back in motion.
Read what to say during playA parent's own gap in football knowledge does not have to stop any of this working.
Read what to do when you don't know footballTonight's five minutes
Watch that much properly rather than the whole ninety half-watching.