New to all this?
Start with the whole approach behind Confident Beginners.
See Confident BeginnersOffside is easier to show than to say, and a child can get it in two minutes.
Explaining the offside rule simply to a child works best as one plain sentence and a two-minute demonstration in the garden, rather than a spoken definition that loses them halfway through.
The sentence is: "When the ball is kicked to you, two defenders have to be at least as close to their goal as you are." Put two "defenders" and one "attacker" on the lawn, roll a pass and let them feel it. The wording is checked against the IFAB Laws of the Game.
For a long time I explained offside with the ketchup and the mustard on the kitchen table, until the salt turned into a goalkeeper and nobody knew what anyone was for.

The sentence to teach
Give them one sentence and let them say it back: "When the ball is kicked to you, two defenders have to be at least as close to their goal as you are." That is the whole idea in a form a child can hold.
Two friendly cues sit on top of it. Standing level with the defenders is fine, and the rule only counts in the other team's half, so a child near their own goal never has to think about it. Law 11 says a player level with the second-last opponent is not in an offside position. Read Law 11 on offside.
This is the child's version and it leaves things out. The ball has to be played to them, and standing in the wrong spot only matters once they get involved in play. Both come back in the law section further down, rather than in the first explanation.
Two minutes, one grown-up, one child
You need a few things from around the house and nothing else. The order below is the whole demonstration.
Goal line. Lay a line of shoes across the far end of the lawn, or use the edge of the garden. That is the goal line the defenders are protecting.
Two defenders. Put two cushions or soft markers in a short row in front of the shoes, one nearer the goal line than the other. The one further from the goal line is the one that matters, because the attacker has to be level with it or further back.
The pass. Stand back with the ball and roll a gentle pass along the ground while your child waits beyond both defenders, closer to the goal line. That is offside, and the pass does not count this time.
The trick. Now let them start level with the defender further from the goal line. Roll the pass, then let them run past both defenders and collect it. That is fine, because position is judged when the ball is played, not where they end up.
"Shall we play defenders and attacker? Stand wherever you like and I'll roll it when I'm ready."
Two out of three is a good day
Play the referee's assistant. Put a cushion "attacker" in three spots in turn: level with the defender further from the goal line, just beyond both defenders and well back behind them. Your child calls "on" or "off" each time. The quoted call is short on purpose: "Freeze. On or off?"
Two right answers out of three is a good day. If the answers are muddled, drop to two spots, level or beyond, and try again another evening. I still stall for a second on "level", and I've been watching for years.
For the last check, ask them to explain it to a teddy or a toy. If the toy gets the sentence right, it has clicked.
The law, briefly
Under Law 11, a player is in an offside position if any part of the head, body or feet is in the opponents' half and nearer to the opponents' goal line than both the ball and the second-last opponent. Hands and arms do not count, and being level is not offside. Read Law 11 on offside.
It is not an offence to be in an offside position. The offence comes from becoming involved in active play, and there is no offside offence when a player receives the ball directly from a goal kick, a throw-in or a corner kick.
Children's organised games often skip all of this. England Football's basic rules for both 7v7 and 5v5 say "Offside: No offside", so a child who keeps asking is simply curious. Read England Football's 7v7 guidance and Read England Football's 5v5 guidance.
The one-line version is a way in, not the full law. The England Football pages describe organised under-10 formats in 2025, and a family's own game, a school game or a league in another nation may differ. The Laws are revised each season, so this is the wording live on 29 September 2026.
For the next question
The question usually arrives when a decision on the screen looks strange. Run the two-cushion demonstration again, and a child who keeps asking is curious, not behind.
For ideas on what to point out while a match is on, try watching football with your child properly. If you want rules for your own garden games, see simple rules that keep any kickabout fun.
Quick answers
One sentence and a demonstration: when the ball is kicked to you, two defenders have to be at least as close to their goal as you are. Set two soft markers as defenders, roll a gentle pass and let the child stand in the wrong spot once.
In England Football's guidance for 5v5 and 7v7 games the basic rules say "Offside: No offside", so a young child's organised game usually does not use it. Rules vary by league and school, so check locally.
No. Under Law 11 a player in an offside position only commits an offence by becoming involved in active play.
The level-or-beyond idea in the demonstration is short enough to try with a six year old, and it is fine to leave the full law for later.
Keep going
Three places to go next, depending on what you are working on. For the other restarts, explaining corner and goal kicks follows on.
Start with the whole approach behind Confident Beginners.
See Confident BeginnersShort bursts and simple things to point out while a match is on.
See watching football togetherFive small changes that keep any garden kickabout fun.
See the simple rulesTonight's five minutes
Roll one gentle pass, let them stand in the wrong spot once, and ask them to call it.