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What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

In this experiment we will be determining whether birds prefer certain colors of seed.

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

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

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

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.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

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

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

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 project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

The goal of this project is to create an exciting topographical map out of dough.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

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!

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.