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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.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

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

Learn with makes water molecules work with this fun and easy science activity!

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

This activity is a great way to teach kids that, to find examples of science in action, they donât need to look any further than their own backyard.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

This science fair project teaches students the differences between fruits and vegetables.

Making your own glass cleaner is easy, effective and inexpensive!

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

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.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This science fair project idea investigates if fats add to the flavor of food.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

In this experiment you will replicate the mummification process by making a hot dog mummy.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

For a fun family activity to introduce your child to genetics, have your child go on a search for dominant and recessive family genes!