Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

This will encourage your child to utilize their observation skills, develop aesthetic awareness, build artistic drawing abilities and learn about the seasons.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

In this activity, your student will be invited to build a chair out of building blocks that is designed to meet the specific size and shape of a small doll or toy figure.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

Here's a pressed leaf card project that puts science and writing together for your second grader.

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

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

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

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Want to spark your third grader's interest in gardening? Help him make popsicle stick fairies to decorate an enchanting garden oasis.

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

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.