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Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea examines whether boys and girls differ in reflexes.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!

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.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

In this science fair project, students create their own miniature salt flats at home.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

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

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

In this design challenge, your child will make a bottle rocket using typical household items.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

In this activity your child will create their very own marble maze!

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.