The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

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

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

Teach your child to dye eggs with natural ingredients from the grocery store. From pink to gold, these eggs are perfect for hiding, hunting or simply munching.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

This science project idea examines the effect of microwaving on various objects.

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

This science fair project idea determines what household items are good conductors of electricity.

Science fair project that determines whether mass and weight are the same or different.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea investigates whether plants can survive being frozen.

This science fair project idea investigates how the shape of an object affects drag.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

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.