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What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

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

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

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

This project examines whether people's taste perception is influenced by what they see.

This project determines what category of person is most likely to be ticklish.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea determines what household items are good conductors of electricity.

This science fair project idea determines what household items are good conductors of electricity.

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

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?