In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

The project determines which type of birds prefer which type of birdseed.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Test whether plants can grow without sunlight and water.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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

This project determines what category of person is most likely to be ticklish.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Explore scientific concepts with this experiment that introduces kids to the scientific method!

This project examines whether people's taste perception is influenced by what they see.

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

This science fair project idea explores whether white light can be separated into different colors.

Plants and light seem to be good buddies, but how far does the friendship really go?

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

In this project, sunlight is blocked from a leaf in order to see the affect that sunlight has on leaves.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This science fair project idea explores how length affects the weight a bridge can hold.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.