This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

This science fair project idea examines the reason boats are shaped and engineered.

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

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

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

This science fair project idea identifies trees using a dichotomous key.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

This science fair project examines how seeds hitchhike on animals and clothing.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

An home science experiment for older students that teaches about the science behind heat.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.