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.

You don't need to head to the Arctic to experiment with life in an igloo. Learners can build their own ice igloo at home from water and empty milk containers.

Test your friends to find out if you can replicate the placebo effect's incredible results.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Help your kindergarten or first grade child use his creativity to make a beautiful magnetic patterned structure while discovering the wonders of magnets.

Set up a fun guessing game for your curious kindergartener, one that will test her ability to use all five of her senses.

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.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

Can't make it to the beach? Bring the science of ocean waves home with this fun earth science-related craft.

Make a spring collage with your child to get them outside and those creative juices flowing!

If your science savy third grader is up for a challenge, let her bend light with a casserole dish!

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Try this chemistry experiment with your curious kid and get some "shocking" results!

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Make scented sensory cloud dough. Add it to a sensory table, activity station, or put it in a baggie for extra at-the-park entertainment!

Invite your kindergarten marine biologist to practice in scientific identification and categorization while creating a lovely treasure box.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

There are hundreds of properties in rocks which you can describe, so get your geology goggles on and get ready to rock your child's science skills.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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.