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.

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

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

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Measure temperature change over time using a variety of insulation materials. Be creative with insulation materials: scarves, yarn, socks, feathers, oil, etc

This science fair project idea examines various dead zones and investigates the cause and how it can be fixed.

For a fun family activity to introduce your child to genetics, have your child go on a search for dominant and recessive family genes!

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This kids' activity is fun to perform and impressive to watch. Plus, it's a great example of Newton's First Law of Motion at work.

This simple experiment serves as an introduction to the greenhouse effect.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Science fair project that studies how the brain transforms man-made symbols into meaningful concepts.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

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

introduction to organic chemistry. study what happens when polymer molecules are mixed with borax solution.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Test of the effect of exercise on rote memory. Prepare a single list of 40 randomly chosen words. Have volunteers recall as many words as possible.

Science fair project that explains and demonstrates the parallax principle.

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

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.