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What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

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

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Demonstrate how to tell the age of an egg without having to crack it open.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

In this project students experiment with making music using only glasses of water.

Magnets may hold up papers on the fridge, but is it the paper that attracts them? Find out more with this kindergarten science investigation.

Start your toy engines -- this is going to be a fast and friction-filled race!

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

In this science fair project, students make their own rain gauge to measure rainfall.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

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

This play-activity causes young children to focus on and become more aware of their sense of hearing and the power of their ears.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

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

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

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!