- Age:6+
- Time:15 min
- Difficulty:Easy
- Mess level:None
- Supervision:Yes
Materials for the paper windmill
Use square paper for the windmill, plus a pin and straw for the spinning handle.
- One square sheet of paper. Origami paper is ideal, but you can turn A4 paper into a square by folding one corner diagonally to the opposite edge and trimming off the extra strip.
- One push pin or map pin. An adult must handle it and secure the sharp point after assembly.
- One drinking straw. A paper or plastic straw becomes the handle. A thin wooden stick can also work if an adult can attach the pin safely.
- A small piece of cork or an eraser. Press this over the pin point at the back of the straw.
- Scissors, only if you need to trim rectangular paper into a square.
- Optional colored pencils or markers for decorating the blades.
👨👧 Adult supervision needed
Scissors and the pin may require adult handling. An adult should prepare the square, push the pin through the paper and straw, and cover the exposed point with cork or an eraser. Pins are also a swallowing hazard, so keep spares out of reach and count them when the activity is finished.
How to make an origami paper windmill step by step
This version forms all four blades with folds rather than diagonal cuts. Watch the video above or keep the diagram beside you as you work through the steps.
Crease a square into a grid, then repeat the same collapse and rotation to form four blades.
- If necessary, turn rectangular paper into a square by folding one corner diagonally to the opposite edge and asking an adult to trim off the extra strip.
- Fold the square in half horizontally, unfold it, then fold it in half vertically and unfold again. You should see a cross through the center.
- Fold the left and right edges to the vertical center crease, then unfold. Repeat with the top and bottom edges. These folds divide the square into quarters in both directions.
- Fold the paper along both diagonals, unfolding after each one so the creases form an X.
- Turn the paper over. Fold all four corners to the center, crease them, and unfold. Turn the paper back over; the full crease pattern is now ready.
- Start at the bottom-right corner. Refold the bottom quarter upward while bringing the right quarter inward. Let the diagonal crease between them open into a small pocket.
- Flatten that pocket so its pointed flap extends to the right. This is the first windmill blade.
- Rotate the paper 90 degrees clockwise and repeat the same bottom-and-right collapse. Keep every pointed flap turning in the same direction.
- Rotate and repeat twice more until you have four matching blades around the center.
- Press every crease firmly. An adult can now push a pin through the center and into the straw. Leave a tiny gap so the paper can turn freely, then cover the pin point at the back.
Test the windmill by blowing gently across the blades or holding it outside in a light breeze. If it does not spin, loosen the pin slightly and check that the paper is not pressed tightly against the straw.
Turn it into an investigation
Predict what will make the windmill spin faster, then test one change at a time: blow from farther away, change the angle, or compare a gentle breath with a stronger one.
How do Windmills or Wind Turbines work?
While there are differences between Windmill and Wind Turbine, the basic functioning principles are the same - they both use wind energy. Windmills were mostly used to mill the grain to flour, wind turbines are used to produce electrical energy. We will describe the principles of producing electrical energy since sustainable energy is an important topic these days.
The Wind Turbine transforms Kinetic energy into Electrical Energy. The numbers match the steps described below.
- The wind blows towards the wind turbine and its rotor blades.
- Rotor blades on the wind turbine turn and transfer the kinetic energy from wind to the drive shaft in the center of rotor blades.
- Some Wind turbines can have a pitch control mechanism. Those are small electric motors that rotate each blade around its own long axis, tilting it to the best angle against the wind (and feathering it out of the wind when the turbine needs to slow down). Turning the whole turbine to face the wind is a different job, done by the yaw motor in step 7.
- Inside the body (called nacelle) at the top of the wind turbine tower, we can find a gearbox. The gearbox converts low-speed rotation from wind (around 16 rpm) to high speed (around 1600 rpm) that is enough to power the generator that sits right behind the gearbox.
- In nacelle, we can also find a generator that is behind the gearbox. The generator takes kinetic energy from the spinning gearbox and converts it into electrical energy.
- On top of the nacelle, we can find an anemometer, which measures the wind speed, and next to it a wind vane, which tells the turbine which direction the wind is coming from.
- Under the nacelle, we can find a yaw motor and brakes. The Yaw motor's job is to rotate the wind turbine in the direction of the wind so it captures the maximum amount of energy. The brakes stop the turbine from turning if the wind is too strong so it won’t get damaged.
- The cable inside the tower of the wind turbine is transferring electrical power to the transformer.
- A transformer converts electricity from the wind turbine to a higher voltage (usually 50 times higher voltage) so it can be connected to the power grid.
- The power grid brings electrical energy, green energy, to our homes.
- Wind continues past the turbine but with less speed and energy, and more turbulence since the turbines have disrupted the flow.
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See what you’ll get →How much electricity can a Wind Turbine produce?
Electricity production is largely influenced by wind strength. A typical Wind turbine has a 2-3 MW (megawatts) capacity and can produce over 6 million kWh (kilowatt-hours) electricity per year. That is enough to power around 1 500 average households!
There are different sizes of Wind turbines but all of them can produce a sizable amount of renewable energy.
The wind turbine has on average 30% to 45% efficiency reaching 50% in the best possible scenarios. That may seem low but at 100% efficiency, it would mean that all wind would be absorbed by the wind turbines.
The faster the wind, the more power the wind turbine generates. When the wind speed doubles, 8 times more electricity is generated. But there is a cap and wind turbines need to be stopped if the wind is too strong or they risk being damaged.
If the wind blows twice as fast, how much more electricity does a wind turbine make?
Make your prediction, then tap an answer to check!
The symbolism of a Paper Windmill
The wind itself is a symbol of change, movement, and energy. The Windmill is a way to achieve that change.
Chinese culture believes that a windmill symbolizes the ability to turn your luck around and embrace changes in your life.
In other cultures windmill frequently symbolizes children’s free, innocent, carefree nature and energy.
In European culture, windmills are famous for their reference in “Don Quixote” where the phrase “tilting at windmills” was coined and is still used today to describe noble but futile and unrealistic fight or cause.
One of the most known symbols of Windmills comes from the famous book Don Quixote.
What Will You Develop And Learn By Making Origami Windmill
- Motor skills and hand-eye coordination
- Attention and concentration
- Math concepts, geometry, proportions, and fractions
- Confidence, patience, and resistance to frustration
- Creativity
Key takeaways
- A paper windmill (pinwheel) is folded from a single square, then pinned to a straw so it spins in the wind.
- Real wind turbines turn the wind's kinetic energy into electricity: the blades spin a shaft, a gearbox speeds it up, and a generator makes the power.
- A windmill grinds grain; a wind turbine generates electricity - same basic principle, different job.
- Wind power grows with the cube of wind speed, so doubling the wind speed gives 8 times the energy, which is why turbines slow or stop in very strong wind.
- Folding builds geometry and fine motor skills, and the spinning pinwheel is a hands-on way to feel wind energy. An adult should handle the pin.
Frequently Asked Questions
How do you make a paper windmill?
Fold a square into horizontal, vertical, diagonal, and quarter-line creases. Use those creases to collapse one pointed blade, rotate the paper, and repeat until all four blades turn in the same direction. An adult can then pin the folded center loosely to a straw and cover the sharp point. This origami version does not require cutting diagonal slits.
How does a wind turbine make electricity?
Wind pushes the blades, which spin a central shaft. A gearbox speeds up that slow rotation, and a generator converts the spinning motion into electrical energy. A transformer then raises the voltage so the electricity can travel through the power grid to homes.
What is the difference between a windmill and a wind turbine?
Both capture the wind's energy, but a traditional windmill uses it to do mechanical work like grinding grain into flour or pumping water, while a wind turbine converts it into electricity. The turbine is the modern, electricity-generating version.
How much electricity can a wind turbine produce?
A typical modern turbine has a capacity of 2 to 3 megawatts and can generate over 6 million kilowatt-hours a year, enough to power around 1,500 average homes. Bigger turbines produce even more, depending on wind strength.
Why does doubling the wind speed give 8 times the power?
Because the energy available in wind grows with the cube of its speed. Doubling the speed means 2 × 2 × 2 = 8 times the power. This is why even a small increase in average wind speed makes a turbine site far more productive.
What do you need to make a paper windmill?
Use a square sheet of paper, a pin, and a straw or thin stick for the handle. Colored pencils are optional. If rectangular paper must be trimmed, an adult should handle the scissors; an adult should also insert the pin and cover its exposed point with cork or an eraser.
If you enjoyed making paper Windmill and want more Origami projects, check out our other posts:
- Make Origami House for making the household for all that power the windmill will generate.
- Origami Pig if you want to expand your household to the whole farm!
- And for even more paper folding, check the Origami category. We are sure you will find more origami activities that you would enjoy exploring.
