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

In this project children practice the scientific method while playing with puffy paint.

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

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

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

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.

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

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!

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.

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.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

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

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

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?

How do organic materials become soil? This science experiment measures what materials biodegrade.

In this science fair project, young children will become aware of and have the opportunity to experience the four basic tastes: sweet, sour, salty, and bitter.

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

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

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

The objective of this science project is to determine the length of time for different seeds to germinate.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Plants and light seem to be good buddies, but how far does the friendship really go?

Test whether plants can grow without sunlight and water.