What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

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.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

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

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

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.

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!

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

This science fair project idea examines which type of insulation holds in the most heat.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Examine the effect of pressure on carbonation in soda.

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

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.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.