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Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

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

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

Science fair project that examines condensation and the conditions needed in order for dew to form.

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

This science fair project idea explores the different properties of matter.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

This project explores ways to prevent static electrical shocks.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

People have favorite flavors, but what about ants? Which ant food is the most popular?

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

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

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

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.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.