Our list of unique science projects is a sure winner when sourcing ideas that are appropriate to the 4th grade learner. Science is a vital component of STEM-based activities and our top 30 project ideas are sure to increase creativity, develop critical thinking abilities as well as effective communication and collaboration skills.  

1. Flashlight Creation

Discover simple electric circuit rules when creating this nifty paper flashlight! This project is the perfect experiment for kids as it’s sure to highlight the science behind batteries. 

Flashlight Creation

2. Lemon Volcano

Have a blast creating this erupting lemon volcano! By using average household supplies, 4th graders discover properties of both acids and bases and learn how the interaction between them causes a chemical reaction. 

Lemon Volcano

3. Earthquake simulation

Set a dish of jelly and then go about building a structure on it. Upon completion of the structure, wobble the dish so that the jelly shakes and disrupts the structure- in turn demonstrating the science of seismology. 

Earthquake Simulation

4. Design a Hovercraft

Time after time, this proves to be one of the best experiments for demonstrating the power of the air. Unveil properties of friction and air pressure as you design a floating hovercraft! 

Design a Hovercraft

5. Make a Microscope 

A cause for STEM excitement! This wonderful project demonstrates how water droplets curve to create a convex lens and in turn, refract light and magnify objects. 

Make a Microscope

6. How Chameleons Change Color

Create a mesmerizing color show as an interactive poster that demonstrates how chameleons change color ass the middle wheel spins. 

How Chameleons Change Color

7. How Your Body is Similar to a Car

Just as we source our energy from food, cars source theirs from gasoline. Further, demonstrate how energy is stored and released with the help of simple materials such as rubber bands. 

How Your Body is Similar to a Car

8. Discover Newton’s Law

With the aid of a string of beads, highlight Newton’s Law of Gravity as the beads are tugged ever so slightly and then begin to fall from the cup. 

Discover Newton’s Law

9. Egg Drop

Students are encouraged to source material from home that they will use to create a protective barrier for their egg before dropping it to measure the effectiveness of their contraption in preventing their egg from cracking. 

Egg Drop

10.  Static Electricity Science

Discover the science of static electricity in a fun way by building an electroscope to demonstrate the forces of attraction and repulsion!

Static Electricity Science

11. Demonstrate Water Erosion

This hands-on, ocean science project is perfect for teaching students about coastal erosion and requires the use of simple materials such as a dish, sand, plastic bottle, stones, and water. 

Demonstrate Water Erosion

12. Milk Plastic 

This unique experiment can lead to hours of crafting fun as 4th grade students learn how to create plastic from milk! 

Milk Plastic

13. Salt Water Density Experiment

The properties of water and density are highlighted in this science project as children discover that saltwater is denser than normal water.  

Salt Water Density Experiment

14. Make Unpoppable Bubbles

By combining the traditional soapy bubble mixture with glycerin, students learn about how the original mixture evaporates from stronger bubbles.  

Make Unpoppable Bubbles

15. Discover More about Blood Components

Biology is an important component of life but should be approached in a fun and simplified manner when working with 4th graders. Discover more about blood components by crafting “blood” model jars!

Discover More about Blood Components

16. Could Dominos knock a Building Over

Discover the effects of chain reactions with the help of this easy science fair project idea before posing the question of whether or not dominos could knock down a building!

Could Dominos Knock a Building Over

17. How Neon Signs Work

By making use of a small gas tube in this cool experiment, 4th graders will be intrigued to learn about how neon signs work. 

How Neon Signs Work

18. Anemometer

Discover wind speed with the help of your very own anemometer! Simple earth science is unveiled with the help of a simple garden contraption made from paper cups, straws, tape, a pencil, and thumbtack.


19. Make Recycled Paper

Although making recycled paper can at times be a process, it is extremely satisfying! Students watch how water is first absorbed by their shredded paper and then, towards the end of the process, how it is drained away- leaving a recycled piece of paper in its place. 

Make Recycled Paper

20. Nonrenewable Resources

What better way to highlight the depletion of non-renewable resources, than by making use of noodle- mining in a competitive game or project! This hands-on activity is perfect for elementary-age students to use as an earth science project.  

Nonrenewable Resources

21. Balloon Rocket

This simple, yet fun, activity depicts Newton’s law of motion perfectly. By using household materials students discover that for every action, there is an equal or opposite reaction. 

Balloon Rocket

22. Cloud Science

With the help of this exciting cloud science project, your 4th grad students will grasp the concept of the water cycle in no time! With the help of a paper cup, plastic zip-top bag, tape, and water students discover how water moves from the ground into the air, then forming clouds before falling back to earth as rain. 

Cloud Science

23. Blow up a Balloon with Vinegar and Baking Soda

Intrigue 4th grade science students with this experiment that sees balloons magically inflate when baking soda and vinegar combine and generate carbon dioxide. 

Blow up a Balloon with Vinegar and Baking Soda

24. Cellphone Projector

Not only is this a great science project, but most of the materials used are recycled materials. This simple project is perfect for teaching complex rules such as the refraction of light. 

Cellphone Projector

25. Create a working elevator 

Students are encouraged to make use of various materials in order to create a working elevator that has a crank and is able to bear a load. 

Create a Working Elevator

26. Ocean current simulator 

By making use of water, food coloring, an empty dish, and plastic sea creatures, students learn how ocean currents are formed in this simple science project. 

Ocean Current Simulator

27. Bacteria grower

A simple Agar solution, that has been set in various Petri dishes, is the perfect breeding ground for bacteria. Swab items that the students use on a daily basis and wipe the swab’s on the dishes, then leaving them covered in order to grow and visually depict that bacteria are hiding all around us. 

Bacteria Grower

28. Wiggle Bot

Craft your very own Wigglebot! Using simple tools and supplies, 4th graders have the opportunity to work with potential energy in a fun manner!

Wiggle Bot

29. Crystal names

Make science fun as students grow an edible, crystalized version of their names on pipe cleaners! This is just one of the many edible science projects out there for kids so be sure to get creative and see what you can make! 

Crystal Names

30. Capillary Action

Teach the concept of capillary action with this spectacular rainbow glass display! This is a fantastic opportunity for students to learn about color mixing and how water travels.

Capillary Action

The activities we’ve provided are perfectly adaptable and may be employed in individual, pair, or group settings. Be inspired to design creative classes with the help of our comprehensive list of science projects above. We strive to make learning fun whilst still highlighting the key concepts of science in a simplified manner.

Frequently Asked Questions

Why is science important for 4th graders? 

Science-based learning at an elementary level introduces students to a STEM-based classroom focus and opens them up to STEM-related careers at a young age. Students discover key concepts about the world around them- unveiling properties of water, electrical currents, animals, ocean currents and so much more along the way!