In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

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.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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.

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

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!

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

This science fair project idea provides evidence that air is everywhere and takes up space.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Discover which fabrics shrink the most in the wash and why.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

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

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

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

Demonstrate how to tell the age of an egg without having to crack it open.

Do you think heat can affect a plant's growth rate?

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.