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.

In this project children practice the scientific method while playing with puffy paint.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This science fair project idea investigates how magnetism can defy the force of gravity.

This science fair project idea demonstrates that plants give off water.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project idea explores how length affects the weight a bridge can hold.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

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.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.