Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

This science fair project idea experiments with spinning color wheels and optical illusions.

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

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

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

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.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

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

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

This science fair project idea determines the most effective method of preserving food.

This science fair project idea examines which type of insulation holds in the most heat.

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

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.

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

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

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

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

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

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.