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The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

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

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

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Who needs paint, glitter, or crayons when you have natural art supplies right outside your front door?

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

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

In this design challenge, your child will make a bottle rocket using typical household items.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

In this activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

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

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

The goal of this project is to create an exciting topographical map out of dough.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea investigates whether plants can survive being frozen.

How powerful is the reaction between baking soda and vinegar? Find out here!

This science fair project idea explores substances that cause a bubble to last longer.