3rd and 4th Grade Science Projects Resources

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

This science fair project idea determines what household items are good conductors of electricity.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

This science fair project idea explores the different properties & interactions of sugar molecules.

This science fair project idea experiments with spinning color wheels and optical illusions.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Take a dive into the candy jar with this yummy science experiment.

This science fair project idea investigates how magnetism can defy the force of gravity.

Discover how and which salt melts ice the quickest.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.