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In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Learn how different types of soil affect how animal tracks form in this experiment!

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

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Is it a square or a circle? See if you can trick your friends with this zany science project!

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

In this science fair project, young children notice and track changes in trees throughout the year.

Word color association is just a fancy way to talk about the way we connect colors with words.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This classic children's game demonstrates how sound travels through air vs. through a solid.

This project determines what category of person is most likely to be ticklish.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Use pepper and soap to discover some fun facts about the properties of water.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

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

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

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

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.