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!

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

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.

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

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Find out whether a longer airplane will fly farther or a wider paper airplane.

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

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.

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.

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.

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.

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.

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 examines whether plants are still able to grow normally if they are turned upside-down.

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.