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

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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.

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

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

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

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Let your fabulous crafter use their favorite flowers, fruits and herbs to whip up a delicious perfume that they can proudly present to a friend or a loved one.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

This first grade science activity brings the green grass of early spring inside while teaching your child about the cycles of growth.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.