What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This science fair project idea identifies trees using a dichotomous key.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

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

In this science fair project you will make a model of a cell membrane using very simple material.

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

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

This science fair project idea determines if family members can recognize one another using only the sense of smell.

Construct and experiment with a periscope using reflected light rays to gather an image.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea produces sounds by creating vibrations using different objects.

In this project, waves of vibrations are experimented with using water in glasses.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.