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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 is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

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 do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost 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 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.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

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

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Come take off your shoes and explore with your feet. Your child will embark on a barefoot adventure as he plays with different textures.

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

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.

This activity allows your kindergartener to translate what they observe into a beautiful poem.

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.