Science activity
Renewable Energy Fair
Discover the power of the Sun, wind, and water! Feel the Sun warm your hand, blow a pinwheel with wind, and watch water push a toy boat. Nature gives us energy!
Materials and setup
- aluminum foil
- cardboard box
- plastic wrap
- pinwheel or paper and straw
- plastic spoons
- pencil
- cork
- string
- thermometer
- small weights
- tape
How this changes by age
Pre-K (ages 3–4)
Discover the power of the Sun, wind, and water! Feel the Sun warm your hand, blow a pinwheel with wind, and watch water push a toy boat. Nature gives us energy!
Steps
- Go outside on a sunny day. Hold your hand in the sun and in the shade. 'Which feels warmer? The sun gives us heat energy!'
- Make a pinwheel from paper and a straw. Blow on it and watch it spin. Hold it in the wind. 'Wind can make things move — that is energy!'
- Fill a shallow tub with water. Place a toy boat in it. Pour water from a cup to push the boat. 'Moving water has energy too!'
- Set a piece of black paper and white paper in the sun. After 10 minutes, feel both. 'The black one is warmer! It soaked up more sun energy.'
- Talk about it: 'The Sun, wind, and water give us energy that never runs out! We call that renewable energy.'
- Tell a grown-up one thing that surprised you.
Learning objectives
- Experience energy from the Sun, wind, and water firsthand
- Understand that energy makes things warm, move, or spin
- Learn that some energy sources are renewable and never run out
Kindergarten (ages 5–6)
Build simple devices powered by the Sun, wind, and water. Compare how well each energy source works and learn why renewable energy is important for our planet.
Steps
- Build a solar oven: line a box with aluminum foil, cover the top with plastic wrap. Place a chocolate square on a dark plate inside. Set in the sun. Check in 30 minutes — did it melt?
- Build a windmill: push pinwheel blades into a cork on a pencil. Blow on it or set it in the wind. Tie a string to the pencil with a small weight — can the windmill lift it?
- Build a waterwheel: tape plastic spoons around a pencil like a wheel. Hold it under a stream of water from the faucet. Watch it spin!
- Compare: which device produced the most noticeable energy output? Which was easiest to build?
- Discuss: 'These energy sources never run out, unlike gas and oil which can be used up. That is why renewable energy helps our planet.'
- Draw all three devices and label them: solar, wind, and water power.
- Tell a grown-up one thing that surprised you.
Learning objectives
- Build functional devices that harness solar, wind, and water energy
- Compare the effectiveness of different renewable energy sources
- Explain why renewable energy is better for the environment than fossil fuels
Early elementary (ages 6–8)
Build and test renewable energy devices, measure their output, compare to fossil fuels, and create an energy fair presentation showing the advantages and challenges of each source.
Steps
- Research the main renewable energy sources: solar, wind, hydroelectric, geothermal, and biomass. List how each one works, advantages, and disadvantages.
- Build a solar water heater: coil black tubing or a black-painted jar in the sun. Measure water temperature before and after 30 minutes of sun exposure.
- Build an optimized windmill: test different blade numbers (3, 4, 6, 8), blade angles, and blade materials. Measure output by how many paper clips the windmill can lift.
- Build a waterwheel and measure its power: count rotations per minute under different water flow rates.
- Research your area's energy sources: where does your electricity come from? What percentage is renewable? Compare to countries leading in renewable energy.
- Create an Energy Fair presentation board: display each device, present your measurement data, and make a recommendation for which renewable source is best for your local area based on climate.
- In one sentence, tell a parent or sibling what surprised you today.
Learning objectives
- Build and optimize renewable energy devices with measured output
- Compare the advantages and limitations of different renewable energy sources
- Analyze local energy sources and make evidence-based recommendations
Upper elementary (ages 8–10)
Conduct a comprehensive energy study: build and measure renewable devices, calculate energy efficiency, research the global energy transition, and design a renewable energy plan for your school or home.
Steps
- Research energy science: energy forms (kinetic, potential, thermal, electrical), energy conversion, and efficiency (useful output / total input). No energy conversion is 100% efficient.
- Build and measure a solar cooker: track temperature over time, calculate heating rate. Compare sunny vs cloudy conditions. Calculate approximate energy captured using water mass, temperature change, and specific heat capacity (Q = mcT).
- Build an optimized wind turbine: test systematically changing blade design variables. Measure output (rotations per minute lifting a weight). Calculate approximate power output.
- Research the global energy transition: what percentage of world energy is renewable? Which countries lead? What are the main barriers (storage, intermittency, cost)? How is energy storage technology (batteries, hydrogen, pumped hydro) addressing these?
- Calculate your household energy use: check your electricity bill. Research how many solar panels or wind turbines would be needed to power your home. Is it feasible?
- Design a renewable energy plan for your home or school: specify which sources, estimated output, cost analysis, and environmental impact reduction. Present as a formal proposal.
- In one sentence, tell a parent or sibling what surprised you today.
Learning objectives
- Calculate energy efficiency and approximate power output of renewable devices
- Evaluate the challenges and solutions in transitioning to renewable energy globally
- Design a feasible renewable energy plan with calculations and cost analysis
Safety and evidence note
Read the full activity before beginning. An adult should supervise tools, heat, food, outdoor work, movement, and experiments as appropriate. Completion records that the activity was done; the child’s explanation, work sample, photo, or demonstration is stronger evidence of learning than a completion check alone.
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