Kids & Learning
A hand-picked set of Zerdly games that are great for young players — free, private, and playable in any browser.
Private by design. Every game runs in your browser — no sign-up, no accounts, no chat, and nothing about your child is uploaded. Progress and favourites stay on this device only.
Explore Kids & Learning
All Kids & Learning
Spin the Wheel
Custom spin wheel and random name picker.
Sudoku
Free online sudoku puzzles.
Memory Test
How long a sequence can you recall?
Snake
The classic grow-the-snake arcade game.
Jigsaw Puzzles
Assemble interlocking jigsaw pieces.
2048
Slide and merge tiles to 2048.
Bubble Shooter
Aim, match and pop the bubbles.
Word Search
Find the hidden words in the grid.
Virtual Piano
Play a piano with your keyboard.
Crossword
Solve a fresh interlocking crossword.
Zerdlings
Hatch a Zerdling and raise it in real time.
Zerdly Maths
Free maths practice that runs in your browser. Adapts as you go, explains every answer, no account.
Times Tables Trainer
Pick your tables and practise. Adapts as you go, with hints and step-by-step explanations.
Addition Practice
Number facts through to carrying and bigger numbers, with base-ten explanations.
Subtraction Practice
Taking away, two-digit sums and exchanging across columns, explained step by step.
Multiplication Practice
Past the tables: two-digit numbers, partial products and long multiplication, shown as arrays.
Division Practice
Sharing into equal groups and dividing through the tables. Exact answers, no remainders yet.
Fractions Practice
Adding, taking away, multiplying and dividing fractions, with the working shown at every step.
Decimals Practice
Adding, taking away, multiplying and dividing decimals, with the working shown at every step.
Area and Perimeter Practice
Rectangles from counting squares up to finding a missing side, every question drawn.
Shapes Practice
Count the sides, corners and right angles. Every shape is drawn turned, so you look rather than guess.
Angles Practice
Read a drawn protractor, then find a missing angle on a line, in a triangle or around a point.
Percentages Practice
Percentages of an amount, scores as percentages, increases and decreases, and working back to the whole.
Number Patterns Practice
Counting sequences and missing terms, building step by step towards simple equations.
Measurement and Units Practice
Converting length, weight, capacity and time — millimetres to kilometres, grams to kilograms.
Charts and Averages Practice
Read real drawn bar charts, then find the mean, median and range.
Chance and Counting Practice
Early probability by counting outcomes: how many ways, how many are left, how many to expect.
Telling the Time
Read an analogue clock from o'clock to the minute, plus the 24-hour clock.
Money Maths
Adding up prices, working out change and buying several of something. Choose your currency.
Number Bonds
Bonds to 10, 20, 100 and beyond — find the missing number, with hints when you want them.
Place Value Practice
What each digit is worth in two- to five-digit numbers, explained in tens and hundreds.
Maths Speed Test
How many can you get in 30, 60 or 120 seconds? Adding, taking away, tables and dividing, mixed.
Missing Number Practice
Find the missing number in a number sentence, with the gap in every position.
Number Line Practice
Read a number off a real number line — whole numbers, tenths, negatives and fractions — and step along it.
Rounding Practice
Round to the nearest 10, 100, 1,000, whole number or tenth — drawn on a line so you can see which end is nearer.
Equivalent Fractions Practice
Make two fractions equal, and cancel fractions down to their simplest form.
Compare Fractions Practice
Which fraction is bigger? Including the case where bigger numbers mean smaller pieces.
Fractions, Decimals and Percentages
Convert in every direction — 3/4, 0.75 and 75% are one amount written three ways.
Elapsed Time Practice
How long between two times, what time something finishes, and what time it started.
Coordinates Practice
Read a point off a grid, move it and finish a rectangle — first quadrant, then all four.
Algebra Basics Practice
Put a number in for a letter, then work backwards to find what the letter stands for.
Order of Operations Practice
What do you do first? Brackets, then times and divide, then add and take away.
Ratio and Proportion Practice
Equal ratios, simplest form, sharing an amount in a given ratio, and scaling recipes.
Powers and Roots Practice
Squares, cubes, square and cube roots, powers of ten and index notation, with the working shown.
Volume and Capacity Practice
Count unit cubes, find the volume of a cuboid, then turn cm³ into millilitres and litres.
Pythagoras Practice
Find the missing side of a right-angled triangle. Whole-number sides throughout, so no calculator.
Solving Equations Practice
Unknowns on both sides and equations with brackets, explained as a balance.
Trigonometry Foundations
Name the sides from a given angle, then write sine, cosine and tangent as exact fractions.
Maths Maze
Pick the door with the right answer and walk on. A wrong door loops back — it cannot be failed.
Daily Maths Challenge
Five questions, the same for everyone, changing each day. Worked out from the date on your device.
Find My Level
A few questions, then a suggested starting point for each tool. Not a test and not an assessment.
Maths Journey
The skills in a sensible order, what you have practised, and a suggested next step. Nothing is locked.
Maths Worksheet Generator
Make a printable worksheet with an answer key. Choose the topic, level and number of questions.
Nonogram
Picture logic puzzles from 5×5 to 25×25, plus a daily. Every puzzle has exactly one solution.
Drawing Pad
A sketchpad and whiteboard with real layers, seven brushes and pressure. Nothing is uploaded.
Pixel Art Maker
A real sprite editor: layers, palettes, symmetry, animation and spritesheet export. Nothing is uploaded.
World Geography Quiz
Find countries on a world map, name capitals, identify flags and outlines, and learn borders, oceans and continents.
Drum Machine
A step sequencer with eight drum voices, swing, patterns, live pads and MIDI or WAV export. Every sound is generated in your browser.
Word Scramble & Unscrambler
Turn a jumble of letters into every word they make, with wildcards and filters, or play the daily scramble.
Word Guess
Guess a hidden word one letter at a time. A correct letter reveals every place it appears, a repeat costs nothing, and every wrong letter drains the signal beacon. Five presets including a hand-picked kids list and a daily word.
Letter Grid Hunt
Trace words through touching letters and take as much of the grid as you can. A square cannot be reused but a letter can, rare letters are worth more, and every word you missed is revealed at the end.
Word Ladder
Turn one word into another one letter at a time, with every step a real word. Every pair is checked to be reachable before you see it, and par is a measured shortest route rather than an estimate.
Cryptogram
Decode a substitution cipher in a clean letter-mapping workspace. Every passage was written for Zerdly rather than quoted, no letter ever stands for itself, and Strict Mapping changes the rule instead of the size.
Letter Hive
Build words from seven letters, always using the core in the middle. Letters repeat as often as you like, every hive holds at least one word using all seven, and the scoring was counted from the dictionary rather than chosen.
Category Sprint
One letter, several categories, one answer each against the clock. Some categories are checked against a real list and the open ones are on your honour — and the game always says which is which.
Trivia Arena
One question at a time, four answers, and an explanation for every one. Every question shows where its fact came from, and the wrong answers are provably wrong.
Word Chain
Every word starts with the last letter of the one before it. Keep the chain going alone, against the clock, or against an opponent that answers back.
3D Block Builder
A voxel building sandbox: place, remove and paint blocks, mirror your work, and rebuild blueprint puzzles.
Fractal Generator
Explore the Mandelbrot set, Julia sets, Burning Ship and Newton fractals. Zoom deep and save wallpaper-sized images.
Yacht Dice
Roll five dice up to three times, keep what you like, then place the hand on the card. Twelve categories, a daily challenge and a coach that shows exact expected values.
Six-Dice Risk
Roll six dice, set aside what scores, then bank or risk the lot. An original rarity-priced score table, three very different opponents and exact bust odds.
Codebreaker
Deduce a hidden code from exact-position and wrong-position feedback. Five puzzles, a daily code, pencil-mark notes and a solver that shows its reasoning without showing the answer.
Zerdly Memory Cards
Turn two cards over and remember where they were. Five boards up to eight by eight, an untimed Zen board, a ninety-second sprint, a daily layout and two players on one device.
Kakuro
Cross sums on boards from 7×7 to 13×13, with a daily. Every puzzle has exactly one solution and is solvable by reasoning — the hint says which deduction, and never guesses.
Arithmetic Cages
Fill a Latin square so every outlined cage hits its arithmetic target. Boards 4×4 to 6×6, a no-operator challenge and a daily — every puzzle has exactly one solution.
Slitherlink
Draw one closed loop along the dots, where each number says exactly how many of that square’s sides the loop uses. 5×5 to 10×10, a no-mistake challenge and a daily — every puzzle has exactly one solution.
Bridges
Join the numbered islands with one or two straight bridges until every number is exactly right and the whole thing is one connected network. 7×7 to 13×13, assisted practice and a daily — every puzzle has exactly one solution.
Box Push
Push crates through compact warehouse puzzles where planning matters more than speed. A 60-level campaign, a move-par challenge and a daily warehouse — every level proved solvable before you see it.
Traffic Escape
Slide tightly packed vehicles along their own axes to clear a path for the target vehicle. Three difficulty presets, an optimal-move challenge and a daily jam — every yard generated here, with its shortest solution worked out exactly.
Path Pairs
Join each pair of matching letters with a path that never crosses, until every square is covered. Three sizes, a relaxed preset and a daily puzzle — every board generated here, and every one proved to have exactly one solution.
Block Fit
Place three offered block shapes at a time, clearing full rows and columns for a clean endless score chase. Four presets and a daily piece stream — and the pieces are decided before you play, so nothing watches the board.
Number Link
Connect identical numbered endpoints through a clean grid without intersections. Three sizes, a minimal-clue challenge and a daily puzzle — every board generated here and proved to have exactly one solution.
Tangram Studio
Fit the seven classic tans into an outline. Seventy-two shapes generated here, five modes including a daily shape and a free workspace, and completion judged by geometry rather than by matching one stored answer.
Logic Grid Mysteries
Work out who was where, and with what, by combining clues across categories on a marking grid. Three sizes, a guided tutorial and a daily mystery — every puzzle generated here and proved to have exactly one answer.
Maze Labyrinth
Find your way out of mazes carved the moment you ask for them. Five modes including a large maze where one press runs you to the next junction, a loop-free perfect maze, and a fog you have to remember your way through.
Tile Slide
Slide the tiles back into order. Three board sizes, generated artwork where every tile carries its own shape, a daily picture everyone gets the same of, and the option to cut up a photo of your own that never leaves your device.
Colour Sort
Pour layered liquids between tubes until every tube holds one colour. A pour always moves the whole run at the top, never an amount you pick — which is the rule the puzzle is built on. Every board is solved by the computer before it reaches you.
Ball Sort
Sort stacked patterned balls into uniform tubes. Classic moves one ball at a time; the Run move preset takes the whole matching run, which makes it a different puzzle rather than a harder one. Every board is solved by the computer before it reaches you.
Rhythm Tap
Notes fall down four or six lanes; tap each one as it reaches the line. Twelve original tracks across three bands, a daily, and a generated groove that never repeats. The results screen shows where your timing actually sits, not just a score.
Precision Maze
Trace a narrow corridor end to end without touching the sides. Thirty courses in three families, three corridor widths from finger-friendly to unforgiving, a daily course and a full keyboard mode.
Reflex Grid
React to the right cell while decoys sit beside it and the rule keeps changing. Five rule variants including go/no-go and a colour-rule switch, a grid that adapts to how you are playing, and a lifetime reaction-time distribution rather than a single number.
Goalkeeper Reflex
Read the shot and dive at the last instant. Waiting tells you more about where the ball is going and costs you the ground you no longer have time to cover. Four modes, a shooter that learns your habits, and a daily set of twenty.
Basketball Shootout
Flick clean jump shots at a hoop only 10.85 cm wider than the ball on either side. Real rim, backboard and swish physics, five modes, and a daily twenty-five that is the same for everyone.
Archery Range
Aim, hold and release while reading the wind, the distance and a target that will not always stand still. Five modes, ten scoring rings, and a daily twelve that is the same for everyone.
Tarmac Racer
A top-down circuit racer with real grip: brake for the corner, get the car straight, then use the throttle. Eight circuits, five modes, a ghost of your own best lap and a daily track.
Rally Drift
Slide a lightweight rally car through generated point-to-point stages where momentum and surface grip matter. Ten stages, four surfaces, a drift score with its own records and a daily stage.
Hover Racer
High-speed anti-gravity racing through luminous original courses where the boost is a budget you place rather than a button you hold. Eight courses, three craft, an Elimination mode and a daily course.
Endless Highway Racer
Thread through flowing traffic for distance, near-misses and escalating speed. Four lanes, an endless road, and a near-miss bonus that only pays when you actually changed lane for it. Five modes including a daily three-minute run.
Micro Kart Sprint
Compact kart racing where drifting is genuinely faster — measured at 2.6% of lap time on average and up to 7% on the circuits that suit it — and forgiving: one press is one drift. Eight circuits, a four-round cup, elimination and a daily track.
Boat Racer
Powerboat racing where the water pushes back. A cross-current moves you off your line whatever you do — worth about 1.5% of a lap in an eleven-metre channel and nothing at all on open water, both measured. Eight waterways, a slalom and a daily course.
Mini Golf
Drag back from the ball and let go. The cup is a speed gate rather than a target — a putt over 1.64 m/s runs straight across it, which is derived from the hole and the ball rather than tuned. Five rounds, holes proved holeable before you see them, and a daily hole.
Pool & Billiards
A full nine-foot table with a two-stage aim, because an ordinary pot is only 0.70 degrees wide. Follow, draw and side, an offline house at three levels, six proved trick shots and a daily run-out.
Darts
Aim, then stop the release meter on the line. The board measures how far your darts scatter and shows you where a spread like that is really worth aiming - which is not always the treble 20. Six games and a daily round.
Bowling
Swipe to set your line, your speed and your hook. The lane is oiled at the front and dry at the back, so the ball skids and then grips - and a ball that arrives straight at the pins cannot strike, however well you aim it. Five games with full ten-frame scoring.
Air Hockey
Drag in your own half and your mallet follows. The surface is almost frictionless, so the puck keeps whatever you give it - and because a mallet covers only 37 per cent of the goal, the shot that scores is the one that arrives off a rail. Four modes, including two players on one screen.
Table Tennis
Move your bat, tap at the top of the bounce, and choose how much of the stroke to spend on spin. A hard flat drive cannot be landed on this table at any angle - spin is what makes the table big enough to hit, and it costs you pace. Four modes, games to 11 and win by two.
Zerdly Pinball
An original circuitry table with a 6.5-degree tilt, so the ball crosses it in 1.4 seconds instead of half a one. Three SYNC lanes, a CPU bank, three missions, a five-minute score attack and a daily ruleset.
Brick Breaker
A paddle that aims: where the ball lands on it sets the angle it leaves at, up to 62 degrees. Eight hand-drawn walls, three boss boards, five original modifiers and a daily layout.
Space Defender
A wave shooter where the gun has barrels, not a fire rate: a bolt ties up its barrel until it lands, so a miss is the most expensive thing on the table. Eight hand-drawn formations, three bosses and a daily run.
Crossing Dash
Hop an energy courier across freight lanes and open charge conduits. A hop takes time and cannot be taken back, and every band is searched and proved crossable before you see it.
Sky Hop
One button, one arc: gravity pulls the drone down and a tap sets it climbing. Every ring is proved reachable before you see it, and the hitbox is deliberately kinder than the shell.
Match-3 Adventure
Swap, clear a line of three and watch the board fall into itself. Charges, cargo to deliver and a twenty-four level campaign whose every move budget was found by playing the level rather than guessing.
For parents
Zerdly is browser-only by design. Nothing your child plays is uploaded, there are no public profiles or leaderboards, and progress is stored locally — clearing your browser data or switching device resets it. Zerdly is for fun and practice, not a substitute for formal educational assessment.