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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 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.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

In this science fair project on the relationship between distance and time, kids explore the behavior of gravitational acceleration through direct observation.

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.

Demonstrate the capillary function in plants by adding food coloring to glasses of water. Slice stalks of celery and leafy tops. Compare color of leaves

Determine how effective animal camouflage is by simulating it in an indoor and outdoor setting.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

Challenge your learner to design and build a city of their own in this creative engineering activity.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

This science project teaches students to classify different shapes of leaves.

Test the placebo effect in different groups of people.

This project will examine the relationship between materials and air resistance.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

This project concerns activity happening millions of miles away, on the sun.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This is a fun and inexpensive project and it's a great way for your child to build basic geometry skills, like shape recognition and pattern/angle familiarity.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

The Galileo inclined plane physics experiment was one of the first ways scientists calculated acceleration due to gravity. Do it yourself in this project!

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

Here's a simple science activity that will help your child better understand how wells bring us water.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.