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

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

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

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

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

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

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

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

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

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

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.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

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.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

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

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

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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

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

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.

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.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

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

This science fair project idea investigates the hardness property of minerals.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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