Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

Find out whether freezing or refrigerating destroys more bacteria. This is essential to consuming safe and germ-free food.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Science fair project that creates fog using bottles of hot and cold water.

A fun activity for a hot day, this will give young kids a chance to experiment with beginning science and math â and splash around in the process!

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

Discover if temperature settings in a fridge make a drastic difference in terms of bacterial growth.

Check out is fun science fair project idea to learn about heat transfer and why certain insulating materials are more practical than others.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

Examine the connection between temperature and chemiluminescence.

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

This project explores what happens to a rubber band when it is heated and cooled.

Science fair project that cultivates slime mold and monitors the stages of its development.

Examine the presence of seeds in open fields. Collect seeds on socks by walking through open fields of grass or other growth. Germinate seeds on socks

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Your child can create his own texture tree, experimenting with design during the process. The result will be a beautiful addition to your holiday decorations

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Use this great no-bake recipe to save energy and keep cool.

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

This first grade science activity is great for winter! Your child will grow and observe her own amaryllis bulb, keeping a journal of her scientific findings.

Making candles from old candles is easy. Recycle old candle stubs to make a "new" candle, and teach your child about recycling at the same time!