This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This project compares the strength of one, two, and three-ply toilet paper.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

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

Enjoy those warm spring and summer nights with your child while teaching some basic astronomy at the same time.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

In this project, waves of vibrations are experimented with using water in glasses.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

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

You don't need to wait for rain to see a rainbow. Make one yourself, and teach your child about light and weather in the process.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

This science fair project idea compares biodiversity between drops of water.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

In this project, different brands of microwave popcorn are tested and compared.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project idea investigates how the shape of an object affects drag.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.