In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

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

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Explore the chemistry of latex polymers with this outrageous, hilarious science activity.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

This science fair project idea produces sounds by creating vibrations using different objects.

The project is to investigate yeast fermentation and its results on hand of latex balloons.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

This science fair project idea provides evidence that air is everywhere and takes up space.

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

This project investigates the affect of storage temperature on microwave popcorn.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science project idea examines the effect of microwaving on various objects.

This science fair project idea produces varying pitches of sound.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

Discover whether cold or hot water from the faucet will boil faster on the stove.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.