This science fair project investigates why the number of visible stars changes from place to place.

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

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

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

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

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

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

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

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Try hammering some plants with your kids to teach them a valuable lesson in flower science while making beautiful artwork in the process!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

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.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

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.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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.

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.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

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.