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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.

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Find out whether matte or shiny nail polish lasts longer.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This science fair project idea explores which fruit molds the fastest.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

This project explores whether similar type movie scenes are accompanied by music with similar characteristics.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

Find out whether people within a family tend to have matching fingerprints.

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.

Science fair project that determines which foods and drinks contain the highest amount of glucose.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

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

This experiment will explore how manipulating a graph of historical information might reveal new information about data.

This experiment examines whether social orientation (extroversion or introversion) is correlated with memory.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Kindergarten algebra is a lot different than high school. In kindergarten math, algebra means grouping like things, or noticing what doesn't belong in a set.