Brain Games: free online logic games for kids (ages 6–14)

Sudoku, futoshiki, nonogram, Tower of Hanoi, sliding puzzle, Nim, memory sequence, mental rotation and mazes: 9 free brain games with several levels each — no ads, no sign-up, phone-friendly.

Free · no ads · no sign-up · works on phones

Sudoku (4×4, 6×6, 9×9)
Age 6+ · elimination, systematic thinking Futoshiki (greater-than sudoku)
Age 8+ · tracking several rules, number order Nonogram (picross)
Age 8+ · two-way deduction, patience Maze (8×8 → 25×25)
Age 5+ · planning, spatial orientation Tower of Hanoi (3–7 disks)
Age 7+ · recursive thinking, planning Sliding Puzzle (8, 15, 24)
Age 7+ · sub-goals, sequencing Nim (strategy game)
Age 8+ · strategy, thinking ahead, patterns Memory Sequence
Age 5+ · working memory, attention Mental Rotation
Age 9+ · spatial intelligence, visual reasoning

Which game builds which skill?

Sudoku (4×4, 6×6, 9×9) — elimination, systematic thinking
Futoshiki (greater-than sudoku) — tracking several rules, number order
Nonogram (picross) — two-way deduction, patience
Maze (8×8 → 25×25) — planning, spatial orientation
Tower of Hanoi (3–7 disks) — recursive thinking, planning
Sliding Puzzle (8, 15, 24) — sub-goals, sequencing
Nim (strategy game) — strategy, thinking ahead, patterns
Memory Sequence — working memory, attention
Mental Rotation — spatial intelligence, visual reasoning

How to use them

10–15 minutes a day: start easy and raise the level when your child is ready. With strategy games (Nim, Hanoi) let them play first, then ask “how did you win?” — explaining the rule in their own words is higher-order thinking at work.

For younger kids: all games · printable: worksheets

FAQ

What age are these brain games for?

Mazes and memory sequence from 5–6, sudoku and Hanoi from 6–7, nonogram, futoshiki, Nim and mental rotation from 8–9. Every game has an easy level.

Do they cost anything?

No. All online games are free, ad-free and need no account.

Is any personal data collected?

No. The games run in the browser and never ask for an account or personal details.