This science fair project idea compares the cuteness reaction between genders.

This science fair experiment examines the relationship between gender, age, and smiling.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Create your very own scented hand sanitizer that will help your child to keep those nasty germs at bay!

Examine the effect of pressure on carbonation in soda.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

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?

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This project explores the interaction between air pressure and playing surface in determining a basketballâs bounce.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

Show your middle schooler how a quick whirl of spinach in the blender will reveal the cobwebby "stuff"--or DNA--of life!

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

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

This project investigates several commercially decaffeinated tea types (black, green, oolong, white) for the presence of detectable traces of caffeine.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Check out this cool science fair project on identifying rocks and minerals for kids.

The objective of this science project is to determine whether the brain first processes colors, shapes, or words when given conflicting messages.