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This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

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.

Learn all about balance and motion as your child designs a corn maze!

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

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.

Plants and light seem to be good buddies, but how far does the friendship really go?

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Use pepper and soap to discover some fun facts about the properties of water.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

Is it a square or a circle? See if you can trick your friends with this zany science project!

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

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

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Create your own cloud with an activity that will explain how important concepts such as evaporation, condensation, and precipitation work.

Make all-natural dye from vegetables to create gorgeous homemade play-silks!