214+ Exciting Science Investigatory Project Ideas You’ll Love

Science investigatory project ideas can be about plants, water, light, animals, or even your favorite snacks! Science is all around us—at home, in school, and even outside! It helps us ask big questions and find fun answers. A great way to learn about science is by doing your own science investigative project. These projects let you test ideas, try cool experiments, and see what happens.

You don’t need fancy tools—just curiosity and simple things you can find at home or school. These projects make learning fun and exciting. You get to be the scientist, ask your own questions, and discover new things. It’s the perfect way to learn while having fun and maybe even surprise your friends or teacher!

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Science Investigatory Project Ideas

What Are Science Investigatory Project Ideas?

Science investigatory project ideas are fun science questions that you can test by doing experiments. These projects help you learn by asking questions, trying new things, and finding answers all by yourself. You become a little scientist and get to explore cool stuff using things you already have at home or school.

List of the most unique science investigatory project ideas:

Plants and Nature Projects

Try different kinds of music to see which one helps plants grow faster.
Shine different colors of light on plants to see which light helps them grow best.
See if a plant can grow without using dirt.
Use different kinds of water and check which one makes the plant the tallest.
Talk to your plant every day and see if it grows more.
Put plants in warm and cold spots to see which grows better.
Hang plants upside down and watch how they grow.
Try different plant foods to see which one makes plants strong.
Grow some plants in the dark to see if they still grow well.
Plant seeds in round pots and square pots to see which ones grow faster.
Put plants in colored plastic bags and see if they still grow.
Grow plants near windows and doors to see where they grow best.
Put seeds in wet cotton and dirt, then see which ones grow first.
Play stories for your plants and watch how tall they grow.
Grow plants in empty soda bottles and see if they do well.
Put many plants together and some alone to see which grows best.
Give plants sweet water or salty water and see what happens.
Use clay pots and plastic pots to see where plants grow faster.
Collect rainwater and use it to grow plants.
Plant different veggie seeds and see which one grows fastest.
Give plants morning sun and evening sun to see what works best.
Make containers with holes and some without to see which grows better.
Try using wet newspaper instead of dirt to grow plants.
Place plants by fish tanks and by themselves to see where they grow better.
Try growing herbs on a sunny window to see which grows best.

Kitchen Science Experiments

Leave bread in different places and see which gets moldy fastest.
Put hot water and cold water outside and see which one freezes faster.
Leave fruits outside and watch which one turns brown first.
Put salt and sugar in warm water to see which disappears faster.
Shake oil and water and see if they mix better.
Mix baking soda and vinegar to see how much it bubbles.
Put milk in warm places and see which type spoils faster.
See if ice cubes melt faster in the air or in water.
Put eggs in salt water and plain water to see which one floats.
Put different cereals in milk to see which float or sink.
Keep vegetables in the fridge and see which stay fresh longest.
Mix hot chocolate with warm and cold milk to see what mixes better.
Open different sodas to see which loses bubbles faster.
Put bananas in paper and plastic bags and see which ripens faster.
Store cookies in different containers to see which stay crisp longer.
Boil water with and without salt to see which boils faster.
Try different sugars and see how fast they melt in water.
Add food color to hot and cold water to see which spreads faster.
Cut apples and see which ones stay white the longest.
Boil pasta in little and lots of water to see which cooks faster.
Put oils in the freezer to see which one gets hard first.
Put gelatin in the fridge and freezer to see which sets faster.
Leave snacks outside and see which ones bring more ants.
Taste different salts to see if they taste the same.
Heat honey to see if it pours faster when warm.

Water and Weather Studies

See if rain falls faster on windy days or still days.
Put materials outside in rain to see which soaks up water fastest.
Check if puddles dry faster in the sun or in the shade.
Watch the clouds and see which ones bring the most rain.
Put snow on dark and light things to see where it melts faster.
Use wide and narrow bowls to see where water dries faster.
Test which umbrellas keep you dry the best in rain.
Freeze water in deep and shallow bowls to see which freezes faster.
Try freezing different drinks and see if they freeze the same.
Check if morning dew shows more on grass or sidewalk.
Get different materials wet in light rain to see which gets wetter.
Taste rainwater and sink water to see if they taste the same.
Blow wind on water and see if it makes more waves.
Use different containers to collect rain and see which holds more.
Pour water on different floors to see which gets slippery first.
Pour water down steep and gentle hills to see which flows faster.
Heat warm and hot water and see which makes more steam.
Try soap in hard water to see which makes more bubbles.
Put items in deep water to see which ones float best.
Put water in the sun and shade to see which heats up faster.
Boil salt water and plain water to see if they boil the same.
See which containers keep ice frozen longest in heat.
Use paper towels to clean spills and see which works best.
Drop water on smooth and rough things to see which rolls faster.
Drop foods in pool water to see if they float or sink.

Sound and Music Experiments

Drop things and see which makes the loudest sound.
Tap on wood and air to see where sound travels faster.
Play instruments and see which can be heard from far away.
Whisper in loud and quiet rooms to see which travels farther.
Stretch rubber bands and see if thick or thin ones sound higher.
Make sounds in full and empty rooms to hear echoes.
Try containers and see which make the best drums.
Play music backwards and see how it sounds.
Blow through long and short tubes to see which sounds deeper.
Make sounds in air and water to see which is louder.
Put stuff over ears and see what blocks scary sounds.
Sing in small and big rooms to hear the difference.
Fill glass bottles and tap to hear music notes.
Make sounds at night and day to see when they travel better.
Use string phones and see which works best.
Clap with wet and dry hands and listen to the difference.
Play music in rooms of different shapes to hear how it changes.
Listen to animals in day and night to see when they are louder.
Build sound walls and test what blocks noise best.
Learn with music or silence to see what helps you remember more.
Go outside and test if high or low sounds travel farther.
Make music using old things like cans or boxes.
Play instruments together to see which sounds better in a group.
Play loud and soft music for plants and watch how they grow.
Make sounds near walls and soft blankets to see how they bounce.

Electricity and Magnet Fun

Use batteries to light up small bulbs and see how many it takes.
Try magnets on different things to see what sticks.
Make a paper clip chain with one magnet and see how long it gets.
Test strong and weak magnets to see which holds more paper clips.
Put magnets through paper and wood to see if they still work.
Try magnets on cold and warm metal to see if it changes.
Make a compass with a magnet and a needle.
Try different sizes of magnets to see which is strongest.
Make a magnet maze under cardboard and guide a paper clip.
Use magnets to move things without touching them.
Try magnets in water and see if they still pull things.
Test if magnets work through plastic, glass, or fabric.
See if shaking magnets near a compass makes the needle move.
Use wires and batteries to make a simple motor.
Put magnets in the freezer and see if they still work the same.
Make a buzzer sound using wires, a battery, and a small speaker.
Try magnets with coins and see which coins stick.
Make a game where magnets pick up paper fish.
Build a simple flashlight using a battery and a bulb.
Put a magnet near your TV remote and see what happens (ask an adult!).
Use tinfoil, coins, and a battery to test what carries electricity.
See how fast a magnet pulls a toy car over different surfaces.
Build a paper windmill that turns using a fan and battery.
Try a lemon battery using wires and see if it lights a small bulb.
Stack magnets to see if more magnets make things stronger.

Color and Light Play

Mix red, blue, and yellow paint to see what new colors you can make.
Shine a flashlight through colored plastic and watch how colors change.
Use a glass of water and a flashlight to make a rainbow.
Try drawing on black and white paper and see which colors pop.
Look at things through red and blue cellophane to see how they change.
Spin a color wheel fast and see what happens.
Shine a flashlight on crayons to see if they melt in the sun.
Try mixing colors with food dye in milk.
See what happens when you color ice cubes with food coloring.
Paint on wet and dry paper to see how the colors look.
Draw with chalk and see how water makes the colors brighter.
Make a simple kaleidoscope with mirrors and colored paper.
Look through different sunglasses and see how colors change.
Use color-changing paper to see which light makes it change fastest.
Put flowers in colored water and watch them change.
Mix colors in water and in oil to see which mixes better.
Freeze colored water to make rainbow ice cubes.
Use blacklight to find colors that glow in the dark.
Try coloring salt or rice and make colorful layers in a jar.
Mix shaving cream and food color for fun art.
Put colors on coffee filters and watch them spread with water.
Look at soap bubbles in the sun and spot the rainbow.
Make sun catchers using glue and food coloring.
Draw with invisible ink using lemon juice and heat.
Make colored shadows using flashlights and colored paper.

Space and Sky Explorations

Look at the Moon every night for a week and draw how it changes.
See if stars are easier to see in dark or light places.
Make a model of the solar system with balls or clay.
Test if you can tell time using the sun’s shadow.
Watch clouds for a week and write down what kinds you see.
Build a paper rocket and see how far it flies.
Use a flashlight and balls to show how night and day happen.
Try using binoculars to see the Moon’s surface better.
See how many stars you can count in your backyard.
Use paper and glue to make a 3D model of a space shuttle.
Watch the sunrise and sunset and write down the colors.
Make a star map to show where your favorite stars are.
See how shadows change in the morning, noon, and evening.
Try bouncing balls to show how gravity works on different planets.
Use glow-in-the-dark stars to make your own night sky.
Make a space helmet from a cardboard box for pretend play.
Spin a ball with stickers to show how Earth rotates.
See how craters form by dropping balls into flour.
Use a timer to see how long it takes for the sun to set.
Create your own constellations with stickers and black paper.
Use foil and string to make a tiny space satellite model.
Learn why astronauts float by testing weight in water.
Make a rocket launcher with a straw and paper fins.
Chart the weather for 7 days to see patterns in the sky.
Make a sundial with a stick and watch where the shadow goes.

More Animal and Nature Science

Put food in your yard and see what animals come to eat it.
Test if ants like sugar or salty snacks better.
Try talking to your pet every day and see how they react.
Watch a bird’s nest (from far away) to see what birds do.
Use a notebook to write about bugs you find outside.
Leave out different seeds and count which birds come.
Test if bugs come to lights more at night or in the day.
Build a small bug house with sticks and leaves.
See what frogs or toads do when it rains.
Put a mirror near your pet and watch what it does.
Leave two types of fruit outside and see what animals eat them.
Try to follow an ant trail and see where it goes.
See if your dog or cat notices when you change your voice.
Watch worms in wet dirt and dry dirt to see what they like.
Build a bird bath and watch who visits.
Test if bugs like dark or light places better.
See if your pet reacts to different smells like lemon or vanilla.
Look for tracks in dirt or mud and try to guess the animal.
Put your pet’s favorite toy in a new spot and see what it does.
Watch squirrels and see what they carry in their mouths.
See if snails like rough or smooth surfaces more.
Make a chart of how much your pet sleeps every day.
Watch how a caterpillar moves and draws its path.
Test which flowers bees visit most in your yard or park.
Try calling your pet’s name in different tones and record its reaction.

Simple Experiments with Everyday Things

Test if warm or cold soap makes more bubbles in your hands.
See which paper plane flies farthest when thrown gently.
Test if paper or cloth keeps your lunch cooler in the sun.
See if eggs roll straighter on wood or tile floors.
Try to grow mold on bread with and without plastic wrap.
See which shoes make more noise when walking on tile.
Test if balloons pop faster in the sun or in the shade.
Try stacking cans and see which shape makes the best tower.
See which coin spins the longest on a hard table.
Test if ice cubes melt faster in metal or plastic bowls.
Drop crayons from different heights and see which break first.
See which lid keeps your water warmer—plastic, foil, or none.
Try pouring sand, salt, or rice and see which pours fastest.
Test how long it takes for socks to dry inside vs. outside.
See if cotton or paper towels soak up more juice.
Try floating bottle caps and count how many hold up a toy.
See if paper clips float with or without tissue paper under them.
Test which paper shape glides the longest when dropped.
See if toys slide farther on smooth tile or rough carpet.
Blow through different straws and see which moves a cotton ball farther.
See if you can lift more books using two hands or one hand.
Test if sugar or salt changes water color more with food dye.
Drop toy cars on ramps and see which ramp shape makes them go far.
Try making tiny boats and see which floats longest in water.
See which cups make the loudest sounds when tapped gently.

What Is the Most Popular Topic in Science?

Some of the most popular science topics are about:

Plants and how they grow
Water and weather
Sound and music
Food and cooking experiments
Light and colors

These are favorites because they are fun, easy, and interesting!

Benefits of Science Investigatory Projects

Learn by doing – You can touch, test, and try things.
Think like a scientist – You ask questions and solve problems.
Use simple materials – Most projects use everyday items.
Have fun learning – It’s a great way to enjoy science!
Get ready for science fairs – These projects are perfect for school competitions.

Resources

You can find science investigatory project ideas in many places:

School science books
Websites for kids’ science projects
Local libraries
Science teachers or parents
Simple items at home (like bottles, paper, water, food)

Just remember to always ask an adult to help if you are using sharp tools or chemicals.

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Summary

Science investigatory project ideas are a fun way to learn new things and explore the world around you. These projects help you ask questions, try out experiments, and find your own answers. You can use everyday items and test how things work in a simple and exciting way. Whether you’re learning about light, sound, water, or even your favorite foods, there’s always something cool to discover.

Science investigatory project ideas are great for school, science fairs, or just for fun at home. They make you think like a real scientist and teach you to solve problems. Most of all, they help you enjoy learning in a hands-on way. So get ready to explore, experiment, and have fun with science!