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

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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

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

Find out whether putting something on top of a plant will inhibit its growth.

This science fair project idea investigates whether plants can survive being frozen.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project idea explores how length affects the weight a bridge can hold.

This science fair project idea explores the different properties & interactions of sugar molecules.

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

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

This project investigates the affect of storage temperature on microwave popcorn.

In this project, the affects of vitamin E are observed on a rose petal.

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

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

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.

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

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

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

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

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