This science fair project idea determines the most effective method of preserving food.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project teaches students about wilting and browning of salad greens.

This social science experiment assesses whether the timing of peak mental performance shifts from afternoon to morning as we age.

Create a colorful, informative display that illustrates the properties of blood cells. Prepare slides using samples of fresh raw beef or chicken bone marrow.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

This science fair project idea explores what it takes to create a biosphere, or a self-sustaining ecosystem.

Evaluate the ability of a biodegradable dish detergent to increase the penetration of water in hydrophobic soils.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

This science project examines the history of earthquakes and what we can do to prevent future disasters.

The actual factors affecting friction may surprise you! Learn about the coefficient of friction and put some trigonometry into practice in this science project.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

This project examines germs and their spread in households. The goal is to learn how to stop the spread of germs and other diseases.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

Discover if soda geysers will erupt when using regular vs. diet cola and which candies will create eruptions.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

Do different types of oil mix or stack? Find out in this science fair project idea!

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

This project examines various algorithms to determine the ideal algorithm for a strategy game.

Study how liquids separate into layers by creating a liquid gradient, different density liquids separate into layers in a graduated cylinder.

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

The goal of this science fair project is to determine which cheese grows mold the fastest: Vermont Cheddar, American, Brie, or Camembert?