What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

If you're looking for something to keep your kid busy on a warm day, and give him some writing practice in the process, bring on the mud!

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Create a brush pile to help wintering wildlife stay warm and cozy through the winter.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

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

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

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

This experiment tests which gender is better at catching how a magician performs his tricks.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

Construct batteries that make electricity from fruits with this fun science fair project.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

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

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

This science fair project investigates why the number of visible stars changes from place to place.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!