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

Using a toy race car kids create a visual model of the Doppler Effect.

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

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

This classic children's game demonstrates how sound travels through air vs. through a solid.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

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

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.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

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.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

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

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.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

This science fair project idea investigates if fats add to the flavor of food.

This project determines what category of person is most likely to be ticklish.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science 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 animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

How powerful is the reaction between baking soda and vinegar? Find out here!

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

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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

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