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

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

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?
Mole mash: 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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