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

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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.

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

This science fair project idea produces varying pitches of sound.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

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

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

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

The goal of this project is to create an exciting topographical map out of dough.