Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

Children learn the six parts of a plant...but do they really understand? Try this plant-themed meal plan to bring school science into the home.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

In almost every preschool classroom is a sensory table. Learn how to make one at home!

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

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

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

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

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

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

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

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Determine whether fresh vegetables have more calories or less calories than canned vegetables.

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

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

In this experiment, you will evaluate whether or not a diet that is supplemented with "brain-enhancing" foods can help improve memory.

Take the plunge into handcrafting with this neat and tidy soap recipe. Here's how to create your own personalized soap.

Learn about how sugar fermentation and growing yeast in this easy science project! Yeast is a eukaryotic microbe that puts the fun in fungus!

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Want to give your teen some insight into the scientific method and get the house cleaned? This activity promises both!

This science fair project idea demonstrates how our fingers prune when in water.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.