Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

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.

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

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 determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

This experiment will explore whether fractals really repeat themselves infinitely.

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

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

This science fair project idea models industrial oil spills and determines if they have an impact on wildlife living beneath the surface of the water.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This science fair project idea experiments with spinning color wheels and optical illusions.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Science fair project that designs a video game that requires players to use relevant skills.

In this science fair project idea, kids make water dance on the surface of a hot pan with the Leidenfrost Effect.

This project analyzes people's emotional responses to images in painting vs similar images in photographs.

This science fair project idea determines whether eating before or after exercise is more beneficial to health and performance.

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

A fun, life science sxperiment idea idea involving strategies for keeping birds away from crops using a distress call. What kind of distress call works best?

Create groups of volunteers based on frequency of playing video games. Compare driving records. Analyze data, interpret findings.

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

This experiment explores the question of whether age and/or gender play a role in people's ability to remember dreams.

This activity is a fun challenge for students who have just started learning to program educational robots.

This project examines the phenomenon of using a mirror to trick a person's brain into experiencing sensations in body parts not actually affected.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Science fair project idea helps conceptualize probability. Compare probabilities and outcomes of cards drawn from a standard playing deck.