Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

This experiment examines if space objects become round after reaching a certain mass.

This project determines how much the rebound rates of tennis balls change after ten games.

This science fair project idea examines the differences between bottle water, filtered water, and tap water.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

This science fair project idea investigates food preference of birds.

This science fair project idea quantifies the effect of weather- in this case temperature and humidity- on musical instruments.

Demonstrate that insects observe colors and choose favorites. Place colored pieces of construction paper on a flat, glassy surface, observe bug preference.

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

Science fair project that tests how heat affects the chemical reaction between a seltzer tablet and a glass of water.

Science fair project that determines the relationship between the temperature and the rate of cricket chirping. How many times do crickets chirp each minute?

Examine the effect of pressure on carbonation in soda.

In this activity, you child will learn about how heat changes food. On the next sunny day, head outdoors to make a treat in an outside oven! Here's how:

Which type of sunglass lenses gives you the best protection from the sun's harmful UV rays? Find out in this cool science project!

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

This project examines whether more expensive golf balls translate into better results on the golf course.

This experiment explores the most common colors that appear among a sample of crossbred guppies.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

Science fair project that uses distillation to convert salt water into fresh water.

Create your own light bulb and test filaments of different thicknesses to see which keeps the bulb burning for the longest time.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.