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.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

This science fair project teaches students about wilting and browning of salad greens.

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

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

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

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

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Take a dive into the candy jar with this yummy science experiment.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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.

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.

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

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

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.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

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

This science fair project idea produces varying pitches of sound.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?