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

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

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

Construct batteries that make electricity from fruits with this fun science fair project.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

Will the shape of an ice cube impact how fast the ice melts?

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

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

Examine the effect of pressure on carbonation in soda.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

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

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

Construct and experiment with a periscope using reflected light rays to gather an image.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!