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

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

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.

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

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

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

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.

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

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

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

Test whether plants can grow without sunlight and water.

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

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

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

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

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

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

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

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

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

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

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

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

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

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

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

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

This science fair project idea identifies clouds as a means of predicting the weather.