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How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This classic children's game demonstrates how sound travels through air vs. through a solid.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

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!

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science experiment has students test whether a snail moves faster on concrete or dirt.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

In this activity your child will create their very own marble maze!

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

This project can help prepare your child for a trip to the tide pools, or give him a way to remember some of the many creatures he saw during his visit.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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

This science fair project teaches students about wilting and browning of salad greens.

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!