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.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

This project compares the strength of one, two, and three-ply toilet paper.

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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.

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

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.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

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

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

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.