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!

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Kids learn about the color rendering index by finding the best lightning for makeup in this fun and original physics science fair project idea.

Science fair project that demonstrates the process known as refraction, which allows glasses and contact lenses to help people with poor vision.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.

Scavenger Hunt! Check out this fun science fair project idea to explore the difference between opaque, translucent, and transparent objects around your house.

Do your laundry and your science project simultaneously! This science fair project investigates whether the color of a garment affects the time needed to dry.

Check out this cool science fair project idea on spectrum spinners and investigate how certain color combination can produce other colors.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

What is a series circuit and how does it work? Learn about voltage, electrical current, and resistors in this cool science experiment!

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Which type of sunglass lenses gives you the best protection from the sun's harmful UV rays? Find out in this cool science project!

In this experiment, you will be making your own paper flashlight by conducting electricty with graphite.

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

This science fair project investigates why the number of visible stars changes from place to place.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

This cool middle school science fair project idea helps students explore the role phototropism plays in the growth of green plants.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.