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

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

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.

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

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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.

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

This science fair project idea determines if the color of light affects the growth of plants.

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

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Find out whether putting something on top of a plant will inhibit its growth.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

This science fair project idea examines liquids of different densities.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science fair project idea investigates how color affects temperature.

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

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science project allows students to study the psychology of happiness.

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.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

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

This science project idea examines the effect of microwaving on various objects.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea investigates if fats add to the flavor of food.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

This science fair project idea explores substances that cause a bubble to last longer.

This science fair project idea investigates the difference in reaction times between boys and girls.

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