Teenydoku

Teenydoku is sudoku for children aged 4 to 7. The grids are small, 4x4 or 6x6, and each number always has its own colour. Children who can't read numbers yet can match the colours, and they learn the numbers as they play. Tap an empty square, then tap a number to put it there. Fill the grid so every row, column and box has each number once. If a number matches another in its row, column or box, both wobble and the number hops back out, so your child can see why it doesn't fit. If they get stuck, the help bulb points to a number that needs changing or a square that's easy to fill next. Every puzzle has exactly one answer, and none needs a guess. Teenydoku makes new puzzles on your iPad or iPhone, so they never run out. Pick one, two or three stars for how hard it is. There are no timers or lives. Each solved puzzle adds a star to their jar, and full jars stand on a shelf on their home screen. The "Another one" button starts the next puzzle straight away. The first time Teenydoku opens, your child picks an animal, then a short how-to-play shows them what to do. Up to six children can share one iPad or iPhone. Each child has their own animal and keeps their own stars and puzzle. To add a child, tap the animal at the top of the home screen, then "Add a child". The settings sit behind a number written in words, such as "forty-seven", that a young child can't read. There you can add a child and see how many puzzles each one has solved. Teenydoku doesn't collect any data about you or your child, and it works without the internet. VoiceOver reads every square and says what each move did, so someone using VoiceOver can play a whole puzzle.