Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

This experiment investigates whether left-handed test subjects have better memories than right-handed participants.

Investigate how to keep your fruit fresh for longer. The purpose of this science experiment it to determine which kind of bag best preserves fruit.

Science fair project that explores the phenomenon of Non-Newtonian fluids by exerting force on different materials.

This fun science fair project for 8th grade demonstrates what Kepler's 3rd law predicts about a planet's orbital period and its distance from the sun.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

Science fair project that examines how cell membranes allow the inward and outward flow of materials as demonstrated by eggs.

In this activity, find out who the flowers' "partners in crime" are by being a flower spy!

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This craft is an excellent way to learn about African-American history, and it also provides fine motor practice.

Your child will create her own falling snowflakes using white paper and glue them over a tree, so it appears as if they are falling from the sky.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This snowman's not abominable, he's adorable! Your child can bring her very own snowman to life while practicing how to create texture.

Here's a great early reading and science activity for curious children. Learn how to plant your child's name in seeds for a growing writing activity!

Research currently available fuel sources, and fuel manufacturing and processing techniques. Propose an alternative fuel source.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

In this design challenge, your child will create a parachute for a small toy using typical household items.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Science fair project that designs a video game that requires players to use relevant skills.