Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Make a planter full of delicious seasonings and classic grilling vegetables, great for a Fatherâs Day gift or a fun start-of-summer outdoor activity.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Create a bee garden to help shelter bees in your area.

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

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Science fair project that examines condensation and the conditions needed in order for dew to form.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

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

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Explore aromas with your child and help boost her brain power with some fun and interactive science activities.

Try this chemistry experiment with your curious kid and get some "shocking" results!

Challenge your learner to design and build a city of their own in this creative engineering activity.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

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.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

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

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

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

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