Want to see your students’ willingness to dig into science without realizing they are studying? Put all science lessons into the school SCIENCE FAIR and let your students get wow with their own investigation in action. Check out for these fabulous ideas and get ready for being amazed by your little scientific geniuses.

1. Carbon Sugar Snake Experiment

Who won’t get excited by a ‘hand-made’ giant carbon sugar snake? This science experiment shows how a carbon snake is born by burning a mixture of baking soda and sugar. You’ll probably consider bringing this outdoor, but the result would definitely worth a try. 


2. Irons in breakfast cereals

Do you know that all extracted iron from your body can make two small nails? Let your students investigate this through a hands-on science with cereals to find out the amount of food-grade iron in their favorite breakfast. For a cooler school science project idea? Go for more brands of cereals to see the difference. 

Steve Spangler Science 

3. Transform Milk into Plastic


How can my daily drinking milk become plastic?. This activity teaches students the concept of plastics polymerization from natural resources such as milk and more. 

Science Buddies  

4. The Competition of Skateboarding Wheels

Going to the school science fair as a skateboard fan? Why not? Bring on this research and inspect its material/ tensile strength of various types of skateboard wheels to see how they affect the rebound.  


5. Powered Boat by Baking Soda

We all remember the classic science experiment of baking soda volcano. Let’s level up the same science reaction with this fun racing boat activity and let the students to fuel-their-ways to win. 


6. Create Two-Stage Balloon Rocket

Want an extension on the previous Baking Soda – Powered boat experience? The science fair would glow up by the experiment of Two-Stage Balloon Rocket. The same principle used in the Racing Boat that you can teach your students about the laws of motion used by airplane jet engines and even by … the rocket!  

Science Buddies 

7. The Sponge Gummy Bears

The secret of gelatin will make your favorite gummy bears transform even bigger in different solutions. An incredible food science project to learn about molecules and have FUN! The only rule: don’t eat your lab tools! 

Steve Spangler Science 

8. Motorized Tiny Characters

Rather than dancing by music, your sixth-grade students would love these DIY motorized characters who dance from the simplest source of energy – a homopolar motor. The example is making tiny dancers, but who knows, what else your creative constructors would create?  

Babble Dabble Do 

9. Magic Spinning Pens

A basic experience requires many science skills from the investigation, trial, research, and more to balance the pen by magnetism. Sounds easy? Your students would need lots of adjustment in magnet size to get their solution for a perfect balance.  

Frugal Fun For Boys and Girl 

10. Create a WiggleBot

Introduce your student to this first ‘robot’. The materials used are easy-to-find and efficient to create a tiny mini creature who can draw (and let your kids wonder what’s next?). Students also get a hint on power, electrical energy, and its sources.  

Research Parent 

11. Build an Electro-Magnetic Train

What needs to adjust in the energy source if we modify the wire length so that our train runs smooth? This hypothesis would be a great start to provoke your little minds’ curiosity.  

Frugal Fun for Boys and Girls 

12. Greeting by Your Handmade Card Circuits

Festive cards are everyone’s favorite. Guide your students to make these circuits and embed them into their greeting cards. Variables to test the flow of electricity like wood or rubber can be a great deal for digging into deep research. 

Kiwi Co  

13. A Solar-Powered Robot Grasshopper

A scary robot grasshopper that vibrates when it’s placed near any light (solar energy). WHAT?!? Record the grasshopper’s level of movement under different amounts of light and solar power to let your students find out how it works.  

Science Buddies 

14. Camera Obscura by Recycled Cans

The handmade camera will become your sixth-grade science students’ buddies in exploring the fundamental principles of how a camera works. What a fabulous pitch for the school science fair!

Babble Dabble Do 

15. Heat Sensitive Color Changing Experience

Mood rings or lipsticks that are color changeable definitely amazed the students. Teachers can introduce the color-changing element (thermochromic pigment) with an example of slime and let your students research together about it. 

Left Brain Craft Brain  

16. Make your own Crystal Landscapes

Let the kids extend their middle school science experiments into mind-blowing fair projects. This spectacular crystal landscape is an example. 

Babble Dabble Do 

P/S: You might find it easy to adjust the ingredients with Epsom Salt when purchasing in the US. Check this similar experience: https://babbledabbledo.com/science-for-kids-crystal-garden/ 

17.   Roots Grow Versus Gravity Experiment:

Gravity keeps our bodies stand still on the ground. But will gravity also affect plants’ growth on the earth?   

Learn more:  Science Buddies 

18.    Seafloor Spreading and the Earthquakes:

What happens when the seafloor spreads? Let’s bring all the science concepts of convergent and divergent boundaries from under the ocean to the lab table. 

See education.com explains further this model as a cooking method.     

19.   How Plants Help Prevent Tsunami Impact:

We know how destructive force a tsunami can be. We’re also encouraged that planting trees would help to prevent natural disasters. But how? Check out the science behind tsunamis and method to limit tsunami impacts.

Learn more from the science videos of  Saferworldcomm and Science Buddies 

20.   How Acidic Water ‘Eats’ Rocks:

Can rocks be dissolved in a liquid like sugar in coffee or tea? In this geology science experience, students will use the scientific method to investigate how rocks are being ‘eaten’ by a wide range of acidic water (vinegar) concentrations.  

Learn more: Science Buddies 

21.  Cutting Ice Cube by Wire:


Yes, ice is hard. But do your middle school students know that they can cut through an ice cube with just a piece of wire and weights? Find out the method with your students and learn more about the regelation of water physics.  

Learn more: Kiwi Co 

22.    Growing Bateria:

Students find samples around the house or school to reveal the hidden bacteria and its density in each place. This activity only contains limited materials but will prove that ‘Wash your hands with soap’ is not just a myth.  

Learn more: Steve Spangler Science 

23. Heart pump model:

Students would construct a human heart ventricle model to explore the cardiovascular system by different types of material. 

Learn more: Tina’s Dynamic Home School Plus  

24.  Building a Stick Bridge:


Look at bridges around and discover with your students about its designs. Challenges kids’ engineering skills to find out which model’s condition is the safest and can stand the most weight.  

Learn more: Scholastic 

25. Building Stable Frameworks for Earthquakes:

This time, safe frameworks used in buildings and construction are being experimented with. Students will identify which science demo frameworks are stable enough under forces (earthquakes). 

Learn more: Science Love to Know 

26.    Forming Magic Cloud:

Easy 6th grade science project that brings on clouds to the fair. Want extra experiments? Try twisting the cap back, re-pressurizing the bottle, and see what happens to the cloud.  

Learn more: Kiwi Co 

27.  Designing Biodomes:

An engineering project to create a scale model biodome, where students can observe the reaction in ecosystems, environments, food chains, and energy flow. The series of experiments scaffold the learners’ understanding of plants and animals’ basic needs, decomposition, and the interdependence of an ecosystem.   

Learn more: Teach Engineering 

28.  The Archimedes Squeeze:

In this hydrodynamic project, students will make their spherical aluminum foil ‘boats’ to test Archimedes’s principle like the real engineers, who actually build ships of steel that can float by this principle. Do your students discover the idea? Eureka!  

Learn more: Science Buddies 

29.    Cleaning coins:

“You clean your clothes with water and soap, but how about cleaning coins?” Provoke your students’ thinking by the question and challenge the experiment with different cleaning solutions.  

Learn more: Gally Kids  

30.  Make Your Own PH Indicator from Leaf of Cabbage:

Don’t have an expensive pH tester. Let your middle school students make their own indicator solution with red cabbage juice and more. 

Learn more: Compound Interest   

What is more fun than learning through hands-on STEM fair experiments? Share your thoughts and check out our website for more latest teaching tips and tricks.    

Frequently Asked Questions

What are some good science fair projects for 6th graders?

School science fair projects are only ideal when it shows the investigation in concepts and theories using scientific methods. Here are 30 of the best science projects and experiments for your 6th grade students to do so.

How do you do the science fair project?

Science Fair Planning Guide for Success:
1. Observe and pick an exciting topic
2. Do background researches
3. Hypothesis: Ask testable questions 
4. Design and carry out your experiments
5. Examine the outcomes/data
6. Document your research as a report
7. Communicate your fabulous project
8. Enjoy the process!