Construct batteries that make electricity from fruits with this fun science fair project.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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 objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

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

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Start your toy engines -- this is going to be a fast and friction-filled race!

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

Test your friends to find out if you can replicate the placebo effect's incredible results.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

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

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

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

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

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

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

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

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

Science fair project that determines whether mass and weight are the same or different.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

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

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.