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

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Reinforce your child’s understanding of the alphabet by helping them construct all of the letters using pipe cleaners.

Study emulsifiers and learn how they are used in food science, medicine, soaps and cosmetics. Identify which materials are created using an emulsifier.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

This science fair project idea determines what household items are good conductors of electricity.

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

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

Science fair project that determines whether mass and weight are the same or different.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

This science fair project idea determines what household items are good conductors of electricity.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This science fair project idea determines whether the diet and taste preferences of humans relate to their personality.

This science fair project determines if the allelopathic chemical produced by the black walnut tree biodegrades immediately or persists over several days.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

This science fair project idea determines how your body responds to allergies.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

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 science fair project idea determines if the temperature of rubber effects how high it bounces.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.