Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Find out whether packaged seeds actually do expire in this new science fair project idea.

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

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Do suds equal more clean or does a sud-free cleaning agent works just as well or even better?

How do crystals form? In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

This science fair project idea explores whether dogs do look like their owners.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Do males really prefer listening to male than female singers? Find out when exploring this science fair project!

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

Do different types of oil mix or stack? Find out in this science fair project idea!

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Thermometers are how we measure temperature, and we've all heard the terms "centigrade" and "Fahrenheit" tossed around, but what do they really mean?

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

Do heavier objects fall faster than lighter ones? Students learn the answer by watching the effect gravity in a vacuum has on a coin and a feather.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

Consult astronomers for opinions and advice. Devise a mathematical argument regarding the probability of other planets supporting extra-terrestrial life.