What works when the lights are out
A power cut is boring in a very specific way. The lights are gone, the router is dead, and nobody can tell you whether it will be ten minutes or most of the evening. You have a phone or tablet, but you would rather not burn through the battery on something noisy and pointless.
For 11-year-olds, the answer is not to make things simpler. It is the opposite. They need something with enough shape to hold attention, but not so much fuss that you end up explaining the rules every two minutes. This is roughly the age GameJar is built around, real difficulty, no hand-holding, and no need for you to hover.
That matters during a power cut. You want games that work with no signal, do not ask for an account, and do not turn into an ad parade the second the router goes out. In GameJar, all eight games are free, there are no ads, and after one online visit they are stored on the device and play in airplane mode.
The prep, done before you leave the connection behind
The useful part happens before the power cut, not during it. Open the games once while you still have a connection. After that, they are stored on the device. Then if the lights go, the router goes, or you are already down to one cautious bar of battery, the games still work.
You do not need to make anyone an account. A child can just play. If you want to set up a player profile, it is only a name and a colour stored on the device. A parent can optionally sign in to sync scores across devices, but nobody has to.
For this situation, it also helps to think in terms of battery. A long, dramatic game that demands total focus is not always the right call when you do not know how long the outage will last. Short rounds are better. Clear stopping points are better. Games that one child can play alone without asking you where to tap next are better.
That narrows the field nicely.
The games that fit this situation and this age
Guess the Word, short rounds, easy to stop, easy to hand back
If the phone battery is a concern, Guess the Word is a sensible first pick. The job is simple, find the day's word in six tries. It is solo, and the rounds are short enough that your 11-year-old can do one, put the device down, then come back later without needing to remember a whole system.
It also has unlimited practice rounds, which is useful when "one more" is acceptable but "half an hour vanished" is not. At this age, the appeal is that it asks for actual deduction. They try a word, read what came back, and adjust. No fuss. No tutorial voice trying to be their best friend.
If you want the mechanics spelled out before handing it over, see Guess the Word: How It Works | GameJar. And if your usual problem is the dead router rather than the dead lights, Guess the Word With No Wi-Fi | GameJar covers that directly.
Picture Logic, quiet concentration when the room is already strange enough
A power cut can make kids oddly restless. There is not much to do, but the atmosphere feels different, so they are not really settling either. Picture Logic is good for that kind of mood.
It is a nonogram. The numbers on each row and column tell you which squares to fill, and a picture appears as you work it out. One new puzzle arrives each day. More important here, every puzzle can be solved by logic. None of them need a guess.
That last part matters more than it sounds. In a situation where patience is already thin, a puzzle that can be reasoned through is much easier to stick with than one that turns into random stabbing. For 11-year-olds, it lands well because it feels like a proper puzzle, not a toy version of one.
Mini Crossword, familiar structure, low commitment
Mini Crossword works well when you want something recognisable. It is a 5x5 crossword, one new puzzle a day, played solo. There are check and reveal helpers if needed, which is useful when the room is dim, patience is shorter than usual, or they are simply stuck on one clue and would rather keep moving.
At 11, many children are happy to work through clues on their own as long as the puzzle is not sprawling. A 5x5 grid is enough to feel real, but not enough to become a project. It suits those awkward in-between stretches during a power cut, too long to just stare out of the window, not long enough to start reorganising the cupboard under the stairs.
Mini Sudoku, proper puzzle difficulty without needing you
Mini Sudoku is another good choice when what you need is a quiet, self-contained challenge. It is solo, with 4x4, 6x6 or 9x9 grids, generated on the device. That gives you some control over how demanding you want the next round to be.
For most 11-year-olds, 6x6 is often the useful middle ground. It is not babyish, but it also does not feel like assigning homework by torchlight. If they already like number puzzles, 9x9 gives them something meatier. If they are newer to it, 4x4 gets them moving without a long preamble.
The practical advantage during a power cut is that it is completely self-contained. No waiting on another player. No need for a signal. No account prompt arriving at the worst possible moment.
Playing together rather than side by side, if the situation allows it
If the room is cold, dark, or generally a bit grim, side-by-side solo play is not always the best answer. Sometimes it is better to have one device and one shared activity. Not online multiplayer, not separate screens, just two people passing the same phone or tablet.
Connect Four is the cleanest option here. Two players can use one device, or one player can play against the computer at three difficulties. The rules need no ceremony, which is useful when everyone is already mildly irritated by the lights being out. An 11-year-old can play it unassisted, but it also works if you want to join in for ten minutes and make yourself useful.
If you want the details first, Connect Four: How It Works | GameJar is the straightforward version. There is also Connect Four With No Wi-Fi | GameJar, which is the same idea in exactly the sort of no-router situation a power cut creates.
Dots & Boxes is another strong choice for this. It is two players on one device, or one player against the computer. The appeal at this age is that the rules are plain, but there is more planning than younger children tend to notice. It is easy to start, easy to pause, and good for "we need something to do for the next twenty minutes".
If you want something a little more involved, Salvo is the more tactical option. Each player hides four ships on a 7x7 grid and tries to find the other's first. In two-player mode, you pass one device back and forth, using the cover so neither player sees the other's board. It suits 11-year-olds well because it feels like a proper contest, not a reflex test.
Off-screen fallbacks for when the device has to go away
Sometimes the battery drops low enough that the phone stops being entertainment and starts being the torch, clock, and emergency contact device. Fair enough. At that point, you need an off-screen plan.
The useful thing is to keep it simple. You are not staging an enrichment retreat. You are getting through an outage.
- Word chain. One person says a word, the next says another starting with the last letter. Add a theme if you want, animals, places, foods, and it stops becoming too easy.
- Twenty questions. Ordinary, reliable, and still effective with 11-year-olds if everyone agrees to ask decent questions.
- Categories. Pick a letter and take turns naming things in a category, cities, films, foods, sports. Keep going until somebody stalls.
- Paper if you have it. Dots and boxes, hangman, and simple logic grids all work perfectly well with a pen and the back of an envelope.
- Read aloud. Not because it is virtuous, but because in low light and low battery conditions it is a surprisingly efficient way to make twenty minutes disappear.
None of these are part of GameJar. They are just useful when the device has to be retired before the evening is over.
The short version
During a power cut, you need games that work with no signal, do not need an account, and can hold an 11-year-old's attention without you running the session. That is the practical case for GameJar. Open the games once while you still have a connection, and they stay available in airplane mode after that.
For solo play, start with Guess the Word, Picture Logic, Mini Crossword, or Mini Sudoku. For playing together on one device, use Connect Four, Dots & Boxes, or Salvo. All eight games are free, there are no ads, and there is nothing to buy.
That does not make a power cut good. It just makes it less silly.
FAQ
Will these still work if the router is off?
Yes. After one online visit, the games are stored on the device and play with no signal, including in airplane mode. That is the useful bit during a power cut.
Does my child need an account to play?
No. No account is needed to play. A parent can optionally sign in to sync scores across devices, but nobody has to. A player profile is just a name and a colour stored on the device.
Which games are best if I want to save phone battery?
Short solo rounds are usually the safest bet, so Guess the Word, Mini Crossword, and Mini Sudoku are good places to start. They are easy to stop and pick up again later.
Can two 11-year-olds play together on one phone?
Yes. Connect Four, Dots & Boxes, and Salvo all support two people passing one device. There is no online multiplayer, chat, or leaderboard outside the household.
Are the games too easy for this age?
No. This is about the age GameJar is built around. The games are simple to start, but they are not written for very young children. An 11-year-old should be able to play all of them unassisted.