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.

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.

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

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

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

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

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

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?

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

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 project investigates the affect of storage temperature on microwave popcorn.

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

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

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

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

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

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

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

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

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

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

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

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.