Some fossils have been been preserved for billions of years! Help your kid understand how fossils are created and preserved with this crafty project.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Construct batteries that make electricity from fruits with this fun science fair project.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project investigates why the number of visible stars changes from place to place.

Find out whether matte or shiny nail polish lasts longer.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

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

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This science fair project idea produces varying pitches of sound.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

This science fair project idea investigates the difference in reaction times between boys and girls.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Have your child kick off their summer vacation by making a miniature water slide!

This science fair project teaches students about wilting and browning of salad greens.

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

In this project, a mnemonic is used to test how it increases memory.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

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

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

Construct and experiment with a periscope using reflected light rays to gather an image.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.