Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

This science fair project idea explores the different properties & interactions of sugar molecules.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Learn how matter transmits sound with a simple, hands-on experiment using sand, water and air.

This baking activity lets kids play with frosting, while experimenting with colors, and how they mix.

Kids will have a hoot constructing this cute owl craft from a recycled toilet paper roll.

Being a kid is hard work. Soothe stresses and calm fears with this DIY Zen garden -- all you need is sand, stones and a shoebox.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Make a homemade doll out of recycled materials, similar to dolls made by pioneer children.

This experiment evaluates if a noisy environment makes it harder for test subjects to perform tasks that require hand-eye coordination.

This experiment explores whether caffeine improves athletic performance.

Here's a perfect way to share Halloween treats: black cat candy cones! They are great for parties, decoration or sharing the plunder of trick-or-treat.

In this activity, kids use sponges to make textured stamps for homemade, artistic Valentine's Day cards.

This lucky cake makes the perfect hideout for leprechaun treasure.

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

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

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

This science fair project studies whether DSLR and Point-and-Shoot cameras work the same way under all conditions.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Make this delicious warm apple bread for Hanukkah.

Get inspired by the great outdoors and help your child make a quirky jewelry tree out of chopsticks!

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.

Exponents can be tricky to learn. Fortunately this game provides plenty of multiplication practice for your math student!

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.