Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

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

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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

Have your child kick off their summer vacation by making a miniature water slide!

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.

The project determines the forces that cause paper airplanes to fly and determine which type of paper airplane flies the farthest.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

In this project, sunlight is blocked from a leaf in order to see the affect that sunlight has on leaves.

Engineers in training can get started with this simple wheel-and-axle construction activity.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This project tests the hypothesis that dark colors absorb more heat than light colors.

In this project, different brands of microwave popcorn are tested and compared.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Your child can help your family pet take a breather, and help herself relax, too, with this soothing activity.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this science project, the center of gravity is explored.

In this project, waves of vibrations are experimented with using water in glasses.

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

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

The project investigates how friction affects motion by using different surface textures.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

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

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.