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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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!

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

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.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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.

Help your child learn about animal classification with this fun and delicious activity.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

The project determines which laundry detergent is best for cleaning clothes.

This science fair experiment idea's objective is to understand the general concept of an acid and a base.

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.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Plants and light seem to be good buddies, but how far does the friendship really go?

This science fair project idea explores the different properties & interactions of sugar molecules.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

This science fair project idea investigates whether air has mass and weight.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!