This science fair project idea investigates whether plants can survive being frozen.

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

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

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

In this project, the affects of vitamin E are observed on a rose petal.

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

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

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

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

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

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

The project determines which laundry detergent is best for cleaning clothes.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

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

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

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.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

Help your child learn about animal classification with this fun and delicious activity.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

This science fair project idea is develops new or improved paper making techniques and encourages recycling.