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This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

In this design challenge, your child will create a parachute for a small toy using typical household items.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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 idea is to determine if sound travels best through the air, water or a solid.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

Find out whether a longer airplane will fly farther or a wider paper airplane.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

This science fair project idea determines if the color of light affects the growth of plants.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Examine the effect of pressure on carbonation in soda.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

This science fair project idea explores the egg's thin membrane.

This project investigates the affect of storage temperature on microwave popcorn.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.