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In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This tricky building block challenge asks your learner to think creatively. They will work on their divergent thinking skills as they try to fill up an index card perfectly with building bricks.

Find out which type of sponge holds the most water.

Find out whether matte or shiny nail polish lasts longer.

Find out which kind of bubble wrap fares best when put in impact.

Find out whether putting something on top of a plant will inhibit its growth.

In this fun experiment, we'll find out how color affects heat absorption!

Do different types of oil mix or stack? Find out in this science fair project idea!

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

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

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

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

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.