Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea identifies trees using a dichotomous key.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

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

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.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

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

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 fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

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

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

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

In this project students experiment with making music using only glasses of water.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

Construct and experiment with a periscope using reflected light rays to gather an image.

This science fair project idea produces sounds by creating vibrations using different objects.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

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

In this design challenge, your child will make a bottle rocket using typical household items.

Science fair project in which you will start a fire from scratch without using matches or a lighter.