What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

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.

The project investigates how friction affects motion by using different surface textures.

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

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

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

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

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

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

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

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.

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

Science fair project that examines condensation and the conditions needed in order for dew to form.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

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

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

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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

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

In this science project, the center of gravity is explored.

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

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

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

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

How powerful is the reaction between baking soda and vinegar? Find out here!

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.