Using a toy race car kids create a visual model of the Doppler Effect.

This science fair project idea produces varying pitches of sound.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

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.

In this science fair project, students use the streak test to tell minerals apart from each other.

This science fair project idea investigates the hardness property of minerals.

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

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

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

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Help your child plant a "tea garden": a garden made of herbs for making teas.

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

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

Make edible amber fossils with your second grader to explore the fascinating world of science!

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Try this chemistry experiment with your curious kid and get some "shocking" results!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Learn about this simple machine and make a pulley of your own to use for fun science trials.

In this science fair project, students make their own rain gauge to measure rainfall.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.