Explore scientific concepts with this experiment that introduces kids to the scientific method!

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

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.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

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 recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

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.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

In this design challenge, your child will create a parachute for a small toy using typical household items.

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.

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

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

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

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

In this activity, your child will be challenged to make a tower using paper cups.