Inspired by the curiosity of Isaac Newton?
Get the picture book on Amazon →Scientists for Kids: 9 Famous Inventors and Thinkers Your Child Should Know
Why scientists make the best heroes
Kids ask "why" roughly 300 times a day. (Parents, you know this is true.) That habit, the relentless questioning, the poking and prodding at how things work, is exactly what every great scientist on this list did for a living. The only difference is they wrote their answers down.
Science isn't a subject. It's a personality type. And your child probably already has it.
This list of famous scientists for kids isn't a textbook chapter. It's a set of introductions: short, specific, and honest about the messy, curious people who changed how we understand the world. Some of these names your child may already recognize. A few might be new. All of them were once kids who couldn't stop asking questions.
If your child has ever gotten stuck on why things fall down, that's the perfect place to start. Find the Isaac Newton picture book here →. It's designed for the "why" phase, and kids tend to sprint straight to the gravity experiments after story time.
Isaac Newton — the man who turned a falling apple into a law of nature
In the summer of 1666, Isaac Newton sat in his family's orchard in Woolsthorpe, England, and watched an apple fall. He was 23, had recently left Cambridge due to a plague outbreak, and was using the quarantine downtime to think. Hard.
He didn't just observe the apple. He asked: why down? Why does everything fall toward the Earth, and not sideways, or up?
That question led him to develop the laws of motion and universal gravitation, the same principles that today govern how we launch satellites, calculate orbital trajectories, and understand why you don't float off your chair when you stand up.
Newton also split white light into a spectrum using a prism, establishing that white light isn't a single thing but a mixture of colors. He did this by letting sunlight pass through a prism and watching the rainbow that came out the other side. Then he proved it wasn't the prism adding the colors by recombining them back into white light.
By 1687, he published Principia Mathematica, arguably the most influential science book ever written. He was 44.
Marie Curie — the scientist who refused to be told no
Marie Curie grew up in Warsaw, Poland, at a time when women weren't allowed to attend university there. So she made a deal with her sister: they'd take turns funding each other's education abroad. Marie worked as a governess for years to pay for her sister's medical degree. Then it was her turn.
She moved to Paris in 1891, enrolled at the Sorbonne, and graduated first in her physics degree. Then she got a second degree in mathematics. Then she started doing original research in radioactivity, a word she herself coined.
In 1898, she and her husband Pierre discovered two new elements: polonium (named after her homeland) and radium. In 1903, she became the first woman to win a Nobel Prize, sharing it in Physics with Pierre and Henri Becquerel. Eight years later, she won a second Nobel, this time in Chemistry, for isolating radium. She remains the only person ever to win Nobel Prizes in two different sciences.
She died in 1934 from aplastic anemia, most likely caused by decades of exposure to radiation. Back then, no one yet understood that radiation was dangerous. She kept her research samples in her desk drawers and carried test tubes in her coat pockets.
Her notebooks are still radioactive. They're kept in lead-lined boxes in France, and anyone who wants to study them signs a liability waiver first.
Albert Einstein — the daydreamer who changed physics
Albert Einstein failed his first university entrance exam. He eventually got in, graduated, and then couldn't find an academic job. He took a position at the Swiss Patent Office in Bern instead, spending his lunch breaks thinking about light.
In 1905, at age 26, he published four papers. Any one of them would have made his career. Together, they changed physics permanently. One introduced special relativity and the idea that time moves differently depending on how fast you're going. Another gave us E=mc², which established that mass and energy are the same thing expressed differently.
His theory of general relativity, published in 1915, redefined gravity: not as a force pulling things together, but as the curvature of space caused by mass. The Sun bends the space around it; Earth moves in a curved path because of it.
He won the Nobel Prize in Physics in 1921 for explaining the photoelectric effect, which proved that light travels in discrete packets called photons.
Einstein thought in pictures. He imagined riding alongside a beam of light. He asked what a clock would look like from a train moving at the speed of light. If your child stares out the window and thinks in scenarios, they're in good company.
Nikola Tesla — the inventor who worked in lightning
Nikola Tesla could visualize a complete machine in his mind (every gear, coil, and connection) before touching a single piece of metal. He claimed he could run mental test-drives on inventions for days, checking for wear and stress, before building the first physical prototype.
Born in 1856 in what is now Serbia, Tesla immigrated to the United States in 1884 with four cents in his pocket, a letter of introduction, and a head full of ideas about electrical systems. He briefly worked for Thomas Edison. They disagreed on nearly everything and eventually became rivals.
Tesla's great contribution was alternating current (AC) electrical transmission, the system that powers homes and businesses today. Edison championed direct current (DC). The conflict between them (the "War of Currents") played out in public demonstrations, competing engineering projects, and a PR battle that Tesla, for a long time, lost. But the physics won in the end: AC could be transmitted over much longer distances, and it became the global standard.
Tesla held over 300 patents. His work on the induction motor, radio transmission, and wireless power transfer shaped technologies that are still evolving now.
He died in 1943, largely forgotten, in a New York hotel room. The electric car company named after him is, fittingly, powered by AC motors.
Ada Lovelace — the first computer programmer (in the 1840s)
Ada Lovelace was the daughter of the poet Lord Byron, which gave her a famous name but not much else. Her parents separated when she was an infant. Her mother, determined that Ada not inherit her father's instability, gave her an unusually rigorous education in mathematics. It worked.
In the 1830s, Lovelace began corresponding with Charles Babbage, a mathematician and inventor who was designing a machine called the Analytical Engine, an early mechanical computer that was never actually built in his lifetime. Babbage asked Lovelace to translate an article about the machine from French.
She translated it, then tripled the length of the document with her own notes. Those notes described how the machine could be programmed to calculate Bernoulli numbers: a sequence that required a series of conditional steps, loops, and operations. This is widely considered the first published algorithm intended to be carried out by a machine.
She died in 1852 at age 36. The programming language Ada, developed in the 1980s for the U.S. Department of Defense, is named after her.
Charles Darwin — the collector who changed how we see life on Earth
Charles Darwin was a collector before he was a scientist. As a child in Shrewsbury, England, he collected beetles, minerals, and birds' eggs with the kind of obsessive focus that drove his family slightly mad. He went to Cambridge to study theology, but spent most of his time on natural history.
In 1831, at age 22, he boarded HMS Beagle for what was supposed to be a two-year voyage. It lasted five. The ship visited South America, the Galápagos Islands, Australia, and South Africa. Darwin spent most of it on shore, collecting specimens, taking notes, and puzzling over why species seemed to vary slightly from island to island.
Back in England, he spent the next 20 years building his argument before publishing On the Origin of Species in 1859. The book proposed natural selection: organisms with traits better suited to their environment tend to survive and reproduce more. Over generations, those traits become more common. Species change. New ones emerge.
It's one of the most consequential ideas in the history of science, and it came from a man who spent years watching beetles.
Galileo Galilei — the astronomer who looked up and wouldn't back down
Galileo didn't invent the telescope. A Dutch optician named Hans Lippershey built an early version around 1608. But Galileo heard about it, improved the design dramatically, and pointed it at the sky.
What he saw in 1610 changed everything. Jupiter had moons: four of them (Io, Europa, Ganymede, and Callisto, now called the Galilean moons). This was a problem for the dominant view that everything in the universe revolved around the Earth. Something was clearly orbiting Jupiter.
He also observed that Venus showed phases, like the Moon, which meant it had to be orbiting the Sun, not the Earth. His observations strongly supported the Copernican model: the Sun at the center, planets orbiting around it.
The Catholic Church disagreed. In 1633, Galileo was tried by the Inquisition and found "vehemently suspect of heresy." He was forced to recant and spent the rest of his life under house arrest. He kept doing science anyway.
Born in Pisa in 1564, he died in 1642, the same year Isaac Newton was born, a coincidence that history nerds enjoy pointing out.
Katherine Johnson — the mathematician who calculated the stars
Katherine Johnson was called a "human computer," which in the 1950s was a job title, not a metaphor. At NACA (which became NASA), she and a team of Black women mathematicians performed the calculations that engineers needed: orbital mechanics, trajectories, re-entry angles.
She grew up in White Sulphur Springs, West Virginia, graduated from college at 18, and eventually joined Langley Memorial Aeronautical Laboratory in 1953. The facility was segregated. Johnson worked in a group designated for Black employees, in offices marked "Colored Computers."
The work was the same. The math was the same. The recognition, for a long time, was not.
In 1962, NASA was preparing to send John Glenn into orbit. Glenn's team was using early electronic computers to calculate his trajectory. Glenn didn't fully trust them. He asked for Katherine Johnson to check the numbers by hand. "If she says they're good," he reportedly said, "then I'm ready to go." She checked. He flew.
Johnson received the Presidential Medal of Freedom in 2015. The Katherine G. Johnson Computational Research Facility at Langley is named after her. She was featured in the 2016 film Hidden Figures, which told the story of her and her colleagues, a story that had been left out of the history books for too long.
She's one of the most important scientists for kids to know, not just for the math, but for what she did with it.
Leonardo da Vinci — the artist who was also an engineer, anatomist, and inventor
Leonardo da Vinci kept notebooks. Thousands of pages, written in mirror script (right to left, backwards, readable only with a mirror), packed with observations, sketches, questions, and designs. Flying machines. Hydraulic pumps. Armored vehicles. Studies of the human heart. Diagrams of water currents. Drawings of flowers.
Born in 1452 in the town of Vinci, in what is now Tuscany, da Vinci had no formal scientific training. What he had was an inability to look at anything without needing to understand it completely. He dissected human bodies (dozens of them) to understand how muscles moved and how the heart pumped blood. He studied bird flight for years before designing his flying machines.
He painted the Mona Lisa and The Last Supper. Between sessions, he was figuring out how water moved around obstacles and designing an early version of a solar concentrator.
None of his inventions were built in his lifetime. The technology didn't exist yet. But his notebooks, rediscovered centuries later, showed engineers ideas they hadn't arrived at yet.
He died in 1519 at the age of 67. His notebooks are still being studied.
How to spark your child's inner scientist
You don't need a lab. These three activities use things you already have.
Start with a gravity drop, which comes straight from Newton. Grab two household objects: a pencil and a paperback book. Hold them at the same height and drop them at exactly the same moment. Most kids expect the heavier one to hit first. It doesn't. Both hit at the same time. Newton spent years figuring out why. Your child just observed the same thing.
For a quick light experiment, fill a clear glass with water and place it near a window in direct sunlight. Angle it so sunlight passes through the glass onto a white wall or piece of paper. The light splits into a rainbow. This is what Newton saw in 1666 with a prism: white light isn't one color. It's all of them at once.
Darwin and da Vinci both built careers on patient observation. Give your child a small notebook and a pencil. The rule: draw one thing from the backyard, park, or windowsill each day for a week. No instructions, no right answers. Just looking and drawing. Darwin spent five years doing exactly this, and it changed how humans understand life on Earth.
If your child runs to the window after reading about Newton, or wants to know more about why things fall the way they do, that curiosity has a great home. Find the Isaac Newton picture book here →. We wrote it for exactly that moment.
Where the story starts: the Isaac Newton picture book
Every scientist on this list started the same way: with a question they couldn't let go of.
Newton asked why things fall. Curie asked what radioactivity actually was. Johnson asked whether the numbers were right. Da Vinci asked how birds stayed up. The questions weren't always popular. A few of them got people into serious trouble. But the scientists followed them anyway.
Your child is already doing that. Every "why" is a question worth following.
For kids who are just starting to meet these figures, the Isaac Newton picture book is a natural first stop. It's written for ages 4–8, short enough for a single sitting, and it ends with activities your child can do right away. After reading it, gravity looks different. Which is the whole point.
Find the Isaac Newton picture book here →. For the kid who wants to know why everything falls down.
History's Heroes publishes picture books about scientists, inventors, and thinkers for children ages 4–8. Explore more at historysheroesbooks.com.