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

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

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

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

Plants and light seem to be good buddies, but how far does the friendship really go?

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

In this project children practice the scientific method while playing with puffy paint.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Test whether plants can grow without sunlight and water.

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.

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

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

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

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

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

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

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 project investigates the affect of storage temperature on microwave popcorn.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

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