This project compares the strength of one, two, and three-ply toilet paper.

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.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

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

Discover how and which salt melts ice the quickest.

This science fair project idea identifies trees using a dichotomous key.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

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.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

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

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Help your child make a beautiful homemade sandcastle that will last!

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Try hammering some plants with your kids to teach them a valuable lesson in flower science while making beautiful artwork in the process!

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

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

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

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

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

Encourage local wildlife to settle down in your backyard with this adorable bird nest craft.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

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