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

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

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

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Make a planter full of delicious seasonings and classic grilling vegetables, great for a Fatherâs Day gift or a fun start-of-summer outdoor activity.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

In this science fair project, students create their own miniature salt flats at home.

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

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Make sourdough bread...and learn some colonial history and modern science in the process!