This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

All you need are pencils, paper and some scissors to get started on this easy and fun game to review astronomy information, or other types of study concepts.

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

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

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

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.

It's a rare kid who doesn't like a sandbox. Next time you're out digging, build in some earth science, too.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

This science research project challenges students to think of more effective lobster farming methods.

Follow in the footsteps of movie character legends as you walk your little one through the steps of becoming a junior archaeologist.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

Find out whether packaged seeds actually do expire in this new science fair project idea.

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

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Use natural materials to try out a new kind of weaving. Your child will enjoy gathering their materials outside and then using them to create a piece of art!

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!