Super Soaker
NASA engineer Lonnie Johnson accidentally invented the Super Soaker while working on a heat pump, creating one of the best-selling toys of all time and earning over $1 billion in sales.
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What Is the Super Soaker?
NASA engineer Lonnie Johnson accidentally invented the Super Soaker while working on a heat pump, creating one of the best-selling toys of all time and earning over $1 billion in sales.
What do NASA's Galileo spacecraft and the world's best-selling water gun have in common? They both came from the mind of Lonnie Johnson — a nuclear engineer from Mobile, Alabama, who accidentally invented the Super Soaker while working on a totally different project. It was 1982, and Johnson was experimenting with an environmentally friendly heat pump that used water instead of freon. He was testing a nozzle in his bathroom when a powerful stream of water shot across the room and hit the opposite wall with surprising force. His engineering brain immediately recognized something special: this pressurized water system could become an amazing toy. Johnson spent years refining his idea, using PVC pipes and a two-liter bottle to build a prototype. He called it the Power Drencher. After shopping the idea to toy companies, he signed a licensing deal with Larami Corporation. In 1990, renamed the Super Soaker, it launched into stores — and became the number one selling toy in America in both 1991 and 1992. Lifetime Super Soaker sales are estimated at over one billion dollars. That's an extraordinary achievement for any inventor — but Lonnie Johnson didn't stop there. Today he holds more than 80 patents and is working on advanced battery and energy storage technology. His story proves that the greatest inventions sometimes start with an accident, and that a brilliant mind never stops asking: what if?
Meet the Inventor: Lonnie Johnson
Lonnie George Johnson was born on October 6, 1949, in Mobile, Alabama. Growing up during the Civil Rights era in the Deep South, he showed an astonishing talent for engineering from childhood — building homemade rockets and a robot from scrap parts as a teenager. His robot, which he called Linex, won first place at a University of Alabama science fair, opening doors for a young Black student in 1960s Alabama. Johnson went on to earn a Bachelor of Science in mechanical engineering and a Master of Science in nuclear engineering from Tuskegee University — one of America's most distinguished historically Black universities. He served in the U.S. Air Force and worked at the Air Force Weapons Laboratory before joining NASA's Jet Propulsion Laboratory (JPL). At JPL, Johnson worked on the Galileo mission to Jupiter — one of history's most ambitious space exploration projects — contributing to humanity's understanding of the outer solar system. He invented the Super Soaker in 1982 while working at JPL, demonstrating that creativity doesn't clock out when the workday ends. After the Super Soaker's success, Johnson founded his own engineering company, Johnson Research and Development, and pivoted toward clean energy technology. He continues inventing today, driven by the same curiosity that built Linex in a Mobile, Alabama, garage decades ago.
How It Works
The Super Soaker works on a simple but brilliant principle: pressurized air forces water through a narrow nozzle, creating a powerful stream. When you pump the handle, you are pushing air into a sealed reservoir. That pressurized air presses down on the water in the tank. When you pull the trigger, a valve opens, and the pressurized air forces the water through a narrow nozzle at high speed. The narrower the nozzle, the faster the water shoots out — just like squeezing the end of a garden hose makes water spray farther. This is the Bernoulli principle in action: when a fluid (like water) is forced through a smaller opening, it moves faster. By separating the air reservoir from the water reservoir and using a pumping mechanism to build pressure, Johnson created a water gun that was dramatically more powerful than anything squeeze-based toys could achieve. The engineering is elegant: simple materials, well-understood physics, and brilliant design.
Timeline
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Did You Know?
A NASA Engineer Made It
Lonnie Johnson was working at NASA's Jet Propulsion Laboratory — on the Galileo mission to Jupiter — when he invented the Super Soaker. The same mind that helped send spacecraft to the outer solar system created America's favorite water gun.
The $1 Billion Accident
Johnson invented the Super Soaker by accident while testing a heat pump nozzle in his bathroom. The powerful water stream gave him the idea. Estimated lifetime sales have exceeded one billion dollars.
Built a Robot as a Kid
As a teenager in Mobile, Alabama, Johnson built a working robot from scrap parts and entered it in a science fair at the University of Alabama — where he won first place.
From Jupiter to the Toy Aisle
Before inventing the world's best-selling water gun, Johnson worked on the Galileo mission — NASA's landmark spacecraft that orbited Jupiter and transformed our understanding of the solar system.
The Invention Didn't Sell Itself
Johnson spent years shopping his invention to toy companies before finding a deal. Multiple companies passed on the Super Soaker before Larami Corporation recognized its potential — a reminder that persistence matters.
STEM Connection
The Super Soaker is a perfect introduction to fluid dynamics — the science of how liquids and gases move. Lonnie Johnson, a nuclear engineer by training, applied several key STEM concepts to create his invention. Pressure is the key force: when air is pumped into the reservoir, it builds up pressure that acts on the water. Pascal's Law tells us that pressure applied to a fluid in a closed container is transmitted equally in all directions — meaning the pressurized air pushes the water out through any available opening. Bernoulli's principle explains why a narrow nozzle creates a faster, more powerful stream. These same principles appear everywhere: in fire hoses, garden sprinklers, medical syringes, and even blood pumping through arteries. Johnson's path — from childhood robot builder to Tuskegee engineer to NASA scientist to toy inventor — shows that STEM careers are not straight lines. The skills learned designing spacecraft can lead to designing the world's best-selling toy.
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Super Soaker Complete Teaching Bundle
Lesson Plan
Comprehensive lesson plan covering the invention, the inventor, how it works, and its lasting impact on everyday life.
Student Workbook
Interactive workbook with reading passages, inventor biography, STEM activities, design challenges, and a quiz.
Flashcard Set
40 cards covering vocabulary, key facts, inventor details, how it works, and review challenges.
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📝 Student Workbook
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