An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

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.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

In this science fair project you will make a model of a cell membrane using very simple material.

This science fair project idea explores the different properties of matter.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

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!

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

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

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

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

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

In this project, several food items are tested to determine whether they contain starch.