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

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.

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.

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.

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.

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.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

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

This science fair project idea provides evidence that air is everywhere and takes up space.

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.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

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.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

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.

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.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Examine the effect of pressure on carbonation in soda.