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

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

Wobble tower

Height

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Best

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Click or tap to release the block

How to play Wobble tower

Wobble tower is a physics stacking game. A crane swings a block back and forth above your tower. Tap or press the action key to release it, and the block falls and lands with real physics, so it can slide, tip and wobble. Drop each new block so it balances on the ones below. The taller you build, the more the tower sways, and gusts of wind push it around too. If the tower topples or a block falls off, the run ends. See how many metres you can climb.

Tips

Drop blocks centred, an off-balance block makes the whole tower lean
Wait for the swing to slow at the edges before you release
Let the tower settle after a wobble before adding the next block
Build a wide, steady base, height comes later

About Wobble tower

Wobble tower swaps clean arcade stacking for messy, satisfying physics. Nothing snaps into place, so every block you drop has to actually balance, and the wind makes a tall tower feel genuinely fragile. It is equal parts construction and nerve. Free, no download, plays in your browser.

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Reaction time: How fast can you click when the screen turns green?
Whack a mole: Bonk the moles before they pop back into their holes.
Stroop test: Read the colour, ignore the word. Brain twister in 30 seconds.

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