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.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

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.

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

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

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Start your toy engines -- this is going to be a fast and friction-filled race!

Do different types of oil mix or stack? Find out in this science fair project idea!

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

The objective of this science project is to determine the length of time for different seeds to germinate.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

This science fair project examines how seeds hitchhike on animals and clothing.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

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

Here's a science activity to help your child investigate how seeds are designed to travel.

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.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.