This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This science fair project idea explores how length affects the weight a bridge can hold.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

This science fair project idea investigates how color affects temperature.

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.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Want to spark your third grader's interest in gardening? Help him make popsicle stick fairies to decorate an enchanting garden oasis.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Bring the fun of gardening indoors! By stuffing a simple pair of pantyhose with a few grass seeds on top, your child can grow her very own plant pet.

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 science fair project idea investigates the difference in reaction times between boys and girls.

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

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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

Jazz up your patio or backyard with hip and quirky planters made from simple Mason jars.

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

This science fair project idea explores substances that cause a bubble to last longer.

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

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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

This science fair project idea investigates how the shape of an object affects drag.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

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