In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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

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

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

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

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.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Test whether plants can grow without sunlight and water.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

This science fair project teaches students the differences between fruits and vegetables.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

This biodiversity project examines the biodiversity in your own backyard.

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

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

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

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.