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 project explores whether plants can live and grow when "watered" with juice, soda, or milk.

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

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

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.

Test whether plants can grow without sunlight and water.

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

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

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

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.

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

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

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

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

In this experiment we will be determining whether birds prefer certain colors of seed.

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

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

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

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

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 explores how length affects the weight a bridge can hold.

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 project investigates the affect of storage temperature on microwave popcorn.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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

Explore if planting seeds in a certain direction will affect how fast it germinates.

This science fair project idea investigates if webbed feet help a duck (and others) swim.