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This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

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 science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea investigates the difference in reaction times between boys and girls.

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

This science fair project idea investigates if fats add to the flavor of food.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Find out whether packaged seeds actually do expire in this new science fair project idea.

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

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This science fair project idea produces varying pitches of sound.

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.

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

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

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.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

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.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Construct and experiment with a periscope using reflected light rays to gather an image.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.