★A group of crows mobbing a predator is literally called a 'murder patrol'.★Sea cucumbers breathe through their butts.★Honey never spoils. Archaeologists found 3000-year-old honey in Egyptian tombs that was still edible.★Dragonflies have been around for about 300 million years.★A hummingbird's heart can beat up to 1,260 times per minute.★The microwave oven was invented by accident when a researcher noticed a chocolate bar melted in his pocket.★There are only two countries in the world whose names start with 'The': The Gambia and The Bahamas.★The moon has moonquakes.★Hippos can't actually swim, they walk along the riverbed.★The Hawaiian alphabet has only 13 letters.★Rats laugh when tickled.★The world's oldest known recipe is for beer.★Your tongue print is as unique as your fingerprint.★A group of porcupines is called a prickle.★A blue whale's heart is roughly the size of a small car.★Cows have best friends and get stressed when separated.★Octopuses have three hearts and blue blood.★The dot over the letter 'i' is called a tittle.★Voice actors for Mickey and Minnie Mouse got married in real life.★Avocados are toxic to most animals except humans.★Ketchup was once sold as medicine in the 1830s.★A snail can sleep for three years straight.★A lion's roar can be heard from up to 5 miles away.★Cotton candy was co-invented by a dentist.★The 'new car smell' is made of dozens of chemicals off-gassing from the interior.★Bubble wrap was originally invented as wallpaper.★Bees can recognize individual human faces.★Humans are the only animals that blush.★A cloud can weigh more than a million pounds.★A snail can have up to 25,000 teeth on its tongue.★The Mona Lisa has no eyebrows or eyelashes.★Bananas are curved because they grow towards the sun.★It takes about eight minutes for sunlight to reach Earth.★You can hear a blue whale's heartbeat from more than two miles away.★A group of jellyfish is called a smack.★Cherophobia is an irrational fear of fun or happiness.★A shrimp's heart is located in its head.★More than half of all people alive today have never made a phone call.★A group of frogs is called an army.★The Eiffel Tower can grow up to 6 inches taller during summer.★A 'moment' was medieval unit of time equal to 90 seconds.★The French language has 13 different words for 'kiss'.★The first oranges weren't orange, they were green.★Pigs can't look up at the sky without rolling over.★Humans share 60% of their DNA with bananas.★Most 'silver' spoons are actually made of stainless steel.★Sloths can hold their breath longer than dolphins can.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Sharks existed on Earth before trees did.★Butterflies taste with their feet.★A group of ferrets is called a business.★A jiffy is an actual unit of time: 1/100th of a second.★Barbie's full name is Barbara Millicent Roberts.★Bananas are berries, but strawberries are not.★So far, two diseases have successfully been eradicated: smallpox and rinderpest.★The human brain uses about 20% of the body's total energy.★The first computer mouse was made of wood.★There are more than 1,000 chemicals in a cup of coffee.★The Dutch were once the tallest people in the world.★Polar bears have black skin under their white fur.★There are more stars in the universe than grains of sand on every beach on Earth.★The smell of freshly cut grass is actually a plant distress signal.★Your nose can remember 50,000 different scents.★Cleopatra lived closer in time to the Moon landing than to the building of the Great Pyramid.★Starfish can regenerate their lost limbs.★The longest recorded flight of a chicken lasted 13 seconds.★A mosquito has 47 teeth.★A blue whale's tongue can weigh as much as an elephant.★The first item ever sold on eBay was a broken laser pointer.★Peanuts aren't nuts, they are legumes.★Cashews grow on the outside of a fruit, not inside a shell.★If you lift a kangaroo's tail off the ground it can't hop.★A flock of crows is known as a murder.★There are more possible iterations of a game of chess than atoms in the observable universe.★We have mapped more of Mars than of our own ocean floor.★Goldfish can recognize human faces.★It is physically impossible to hum while holding your nose.★7% of American adults believe that chocolate milk comes from brown cows.★A day on Venus is longer than a year on Venus.★A 'jiffy' is one trillionth of a second in physics.★29th May is officially Put a Pillow on Your Fridge Day.★The shortest commercial flight in the world lasts just 57 seconds.★Chewing gum while you chop onions helps keep you from crying.★The fear of long words is ironically called hippopotomonstrosesquippedaliophobia.★The average person spends six months of their life waiting for red lights to turn green.★The longest hiccuping spree lasted 68 years.★A day on Jupiter lasts only about 10 hours.★The shortest war in history lasted 38 to 45 minutes between Britain and Zanzibar.★Humans blink about 15 to 20 times per minute.★Horses physically cannot vomit.★A bolt of lightning is five times hotter than the surface of the sun.★Cats can't taste sweetness.★Wombat poop is cube-shaped.★A newborn panda is smaller than a mouse.★A group of flamingos is called a 'flamboyance'.★There's a species of jellyfish that is immortal.★A day on Mercury lasts 59 Earth days.★Tigers have striped skin, not just striped fur.★The Great Wall of China is not visible from space with the naked eye.★Google processes more than 8.5 billion searches every single day.★The smell of rain has a name: petrichor.★Ostriches can run faster than horses.★A group of owls is called a parliament.★A newborn kangaroo is about the size of a jellybean.★A hippo's sweat is pink.★The Statue of Liberty was originally intended to be a lighthouse.★Saturn would float if you could find an ocean big enough.★Pigeons can recognize themselves in a mirror.★Octopuses can taste with their arms.★Vincent van Gogh only sold one painting during his lifetime.★A group of pandas is called an embarrassment.★Dolphins have names for each other.★Cows have regional accents, they moo differently in different areas.★In Switzerland it is illegal to own just one guinea pig.★Hot water freezes faster than cold water. This is called the Mpemba effect.★Crows can recognize human faces and hold grudges for years.★Ancient Egyptians slept on stone pillows.★Sea otters hold hands while sleeping so they don't drift apart.★Pineapples take about two years to grow.★An octopus has nine brains.★Elephants are the only mammals that can't jump.★Koalas have fingerprints nearly identical to humans.★The oldest 'your mom' joke was discovered on a 3,500 year old Babylonian tablet.★The inventor of the Pringles can is buried in one.★There is a village in Norway called 'Hell' that freezes over every winter.★Antarctica is the only continent without native reptiles or snakes.★Sloths only poop about once a week.★Dolphins sleep with one eye open.★Scotland's national animal is the unicorn.★Snakes can help predict earthquakes.★The average person walks the equivalent of three times around the world in a lifetime.★Pteronophobia is the fear of being tickled by feathers.★Nintendo was founded in 1889 as a playing card company.★Banging your head against a wall for one hour burns 150 calories.★Your stomach gets a new lining every 3 to 4 days, otherwise it would digest itself.★A crocodile can't stick its tongue out.

★A group of crows mobbing a predator is literally called a 'murder patrol'.★Sea cucumbers breathe through their butts.★Honey never spoils. Archaeologists found 3000-year-old honey in Egyptian tombs that was still edible.★Dragonflies have been around for about 300 million years.★A hummingbird's heart can beat up to 1,260 times per minute.★The microwave oven was invented by accident when a researcher noticed a chocolate bar melted in his pocket.★There are only two countries in the world whose names start with 'The': The Gambia and The Bahamas.★The moon has moonquakes.★Hippos can't actually swim, they walk along the riverbed.★The Hawaiian alphabet has only 13 letters.★Rats laugh when tickled.★The world's oldest known recipe is for beer.★Your tongue print is as unique as your fingerprint.★A group of porcupines is called a prickle.★A blue whale's heart is roughly the size of a small car.★Cows have best friends and get stressed when separated.★Octopuses have three hearts and blue blood.★The dot over the letter 'i' is called a tittle.★Voice actors for Mickey and Minnie Mouse got married in real life.★Avocados are toxic to most animals except humans.★Ketchup was once sold as medicine in the 1830s.★A snail can sleep for three years straight.★A lion's roar can be heard from up to 5 miles away.★Cotton candy was co-invented by a dentist.★The 'new car smell' is made of dozens of chemicals off-gassing from the interior.★Bubble wrap was originally invented as wallpaper.★Bees can recognize individual human faces.★Humans are the only animals that blush.★A cloud can weigh more than a million pounds.★A snail can have up to 25,000 teeth on its tongue.★The Mona Lisa has no eyebrows or eyelashes.★Bananas are curved because they grow towards the sun.★It takes about eight minutes for sunlight to reach Earth.★You can hear a blue whale's heartbeat from more than two miles away.★A group of jellyfish is called a smack.★Cherophobia is an irrational fear of fun or happiness.★A shrimp's heart is located in its head.★More than half of all people alive today have never made a phone call.★A group of frogs is called an army.★The Eiffel Tower can grow up to 6 inches taller during summer.★A 'moment' was medieval unit of time equal to 90 seconds.★The French language has 13 different words for 'kiss'.★The first oranges weren't orange, they were green.★Pigs can't look up at the sky without rolling over.★Humans share 60% of their DNA with bananas.★Most 'silver' spoons are actually made of stainless steel.★Sloths can hold their breath longer than dolphins can.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Sharks existed on Earth before trees did.★Butterflies taste with their feet.★A group of ferrets is called a business.★A jiffy is an actual unit of time: 1/100th of a second.★Barbie's full name is Barbara Millicent Roberts.★Bananas are berries, but strawberries are not.★So far, two diseases have successfully been eradicated: smallpox and rinderpest.★The human brain uses about 20% of the body's total energy.★The first computer mouse was made of wood.★There are more than 1,000 chemicals in a cup of coffee.★The Dutch were once the tallest people in the world.★Polar bears have black skin under their white fur.★There are more stars in the universe than grains of sand on every beach on Earth.★The smell of freshly cut grass is actually a plant distress signal.★Your nose can remember 50,000 different scents.★Cleopatra lived closer in time to the Moon landing than to the building of the Great Pyramid.★Starfish can regenerate their lost limbs.★The longest recorded flight of a chicken lasted 13 seconds.★A mosquito has 47 teeth.★A blue whale's tongue can weigh as much as an elephant.★The first item ever sold on eBay was a broken laser pointer.★Peanuts aren't nuts, they are legumes.★Cashews grow on the outside of a fruit, not inside a shell.★If you lift a kangaroo's tail off the ground it can't hop.★A flock of crows is known as a murder.★There are more possible iterations of a game of chess than atoms in the observable universe.★We have mapped more of Mars than of our own ocean floor.★Goldfish can recognize human faces.★It is physically impossible to hum while holding your nose.★7% of American adults believe that chocolate milk comes from brown cows.★A day on Venus is longer than a year on Venus.★A 'jiffy' is one trillionth of a second in physics.★29th May is officially Put a Pillow on Your Fridge Day.★The shortest commercial flight in the world lasts just 57 seconds.★Chewing gum while you chop onions helps keep you from crying.★The fear of long words is ironically called hippopotomonstrosesquippedaliophobia.★The average person spends six months of their life waiting for red lights to turn green.★The longest hiccuping spree lasted 68 years.★A day on Jupiter lasts only about 10 hours.★The shortest war in history lasted 38 to 45 minutes between Britain and Zanzibar.★Humans blink about 15 to 20 times per minute.★Horses physically cannot vomit.★A bolt of lightning is five times hotter than the surface of the sun.★Cats can't taste sweetness.★Wombat poop is cube-shaped.★A newborn panda is smaller than a mouse.★A group of flamingos is called a 'flamboyance'.★There's a species of jellyfish that is immortal.★A day on Mercury lasts 59 Earth days.★Tigers have striped skin, not just striped fur.★The Great Wall of China is not visible from space with the naked eye.★Google processes more than 8.5 billion searches every single day.★The smell of rain has a name: petrichor.★Ostriches can run faster than horses.★A group of owls is called a parliament.★A newborn kangaroo is about the size of a jellybean.★A hippo's sweat is pink.★The Statue of Liberty was originally intended to be a lighthouse.★Saturn would float if you could find an ocean big enough.★Pigeons can recognize themselves in a mirror.★Octopuses can taste with their arms.★Vincent van Gogh only sold one painting during his lifetime.★A group of pandas is called an embarrassment.★Dolphins have names for each other.★Cows have regional accents, they moo differently in different areas.★In Switzerland it is illegal to own just one guinea pig.★Hot water freezes faster than cold water. This is called the Mpemba effect.★Crows can recognize human faces and hold grudges for years.★Ancient Egyptians slept on stone pillows.★Sea otters hold hands while sleeping so they don't drift apart.★Pineapples take about two years to grow.★An octopus has nine brains.★Elephants are the only mammals that can't jump.★Koalas have fingerprints nearly identical to humans.★The oldest 'your mom' joke was discovered on a 3,500 year old Babylonian tablet.★The inventor of the Pringles can is buried in one.★There is a village in Norway called 'Hell' that freezes over every winter.★Antarctica is the only continent without native reptiles or snakes.★Sloths only poop about once a week.★Dolphins sleep with one eye open.★Scotland's national animal is the unicorn.★Snakes can help predict earthquakes.★The average person walks the equivalent of three times around the world in a lifetime.★Pteronophobia is the fear of being tickled by feathers.★Nintendo was founded in 1889 as a playing card company.★Banging your head against a wall for one hour burns 150 calories.★Your stomach gets a new lining every 3 to 4 days, otherwise it would digest itself.★A crocodile can't stick its tongue out.

Memory

Moves

0

Time

0:00

Pairs

0/8

How to play Memory

All cards start face down. Tap a card to flip it, then tap a second card. If they match, they stay face up. If they do not, they flip back after a moment and you try again. Find every pair to clear the board. The game tracks how many flips you made and how long it took. Try to clear the next round in fewer flips.

Tips

Flip the same starting card every round, you will memorise that one fast
Group your guesses by area, do not jump around the board
Say the picture out loud when you flip it, sound helps recall
Take a breath before flipping the second card, do not rush

About Memory

Card matching memory games are as old as paper. The classic Pelmanism game, named after a 1900s memory training school, was the first commercial version. The TV show Concentration ran the format for decades. Memory is the workout your brain wants when scrolling feels too dumb but a sudoku feels too hard. Three minutes per round and you can feel the focus muscles wake up.

More logic games

2048: Slide tiles to combine them. Reach 2048 or beyond.
Sudoku mini: A quick 6x6 sudoku you can finish on a coffee break.
Drop four: Stack four discs in a row. Beat the friendly bot.
Reversi: Flip your way to a bigger army. Othello against an AI.
Lights out: Turn off every light in the 5x5 grid. Trickier than it looks.
Slide fifteen: The classic 15 puzzle. Slide tiles into order in as few moves as possible.

Browse the full arcade →

00:00Warming up

0Pixels scrolled

0.0cmMouse odyssey

0Clicks made

0.00Calories burned

Got feedback or a site to suggest?

Spotted a broken link, found a hidden gem, or have an idea? We'd love to hear from you.