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Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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

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

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

Using a toy race car kids create a visual model of the Doppler Effect.

This science fair project idea determines the most effective method of preserving food.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

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

Nature is the greatest teacher, and you can help facilitate the lesson! Here's how to create a supply backpack to get your kid ready for science action!

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

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

Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

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

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Construct and experiment with a periscope using reflected light rays to gather an image.