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The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

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

In this cool psychology experiment, study how companies air commercials to strategically advertise to viewers who will buy their products.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Teach your child how butter is created by shaking up cream the old-fashioned way.

Demonstrate that insects observe colors and choose favorites. Place colored pieces of construction paper on a flat, glassy surface, observe bug preference.

This science project has students study the idea of human beauty.

This science fair project idea studies whether eating a hearty breakfast before and exam will get them better test scores.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

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

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Learn how to relight a candle by lighting the vaporized wax in the smoke, and test how various kind of wax and candle brands relight differently.

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

In this science fair project, students investigate how different colors influence appetite.