This project compares the strength of one, two, and three-ply toilet paper.

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

This science fair project idea explores whether talking to a plant will help it grow.

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

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

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

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Test whether plants can grow without sunlight and water.

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

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Do you think heat can affect a plant's growth rate?

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

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.

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.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

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

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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