In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

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.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

Science fair project that determines whether mass and weight are the same or different.

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

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

Demonstrate how to tell the age of an egg without having to crack it open.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

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.

Find out whether putting something on top of a plant will inhibit its growth.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Creating a home for a toad is an easy and fun project for kids. Here's how to make your very own toad abode.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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 horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

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.

Give your budding young observers a chance to discover simple machines at use in their own home.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.