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.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

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

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

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

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 science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

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.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

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

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Check out this cool science fair project on identifying rocks and minerals for kids.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

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

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Have your child kick off their summer vacation by making a miniature water slide!

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

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

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

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.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

This project examines what types of objects burn and which burn faster and cleaner.