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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 science fair project, students use the streak test to tell minerals apart from each other.

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

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

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.

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.

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!

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

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

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

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

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

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

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

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

Want to boost math and science learning? Take a bug expedition and give your first grader practice observing and charting what they see.

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

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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

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.