In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

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

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

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Make a backbone model to explore human anatomy and life science.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science fair project idea explores the egg's thin membrane.

This science fair project idea compares biodiversity between drops of water.

In this design challenge, your child will make a bottle rocket using typical household items.

This science fair project idea investigates how color affects temperature.

This science fair project idea investigates the hardness property of minerals.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This science fair project idea examines which type of insulation holds in the most heat.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

This science experiment has students test whether a snail moves faster on concrete or dirt.