Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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!

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

Discover whether cold or hot water from the faucet will boil faster on the stove.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

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

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.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

How powerful is the reaction between baking soda and vinegar? Find out here!

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

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

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!

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

This science fair project idea investigates how magnetism can defy the force of gravity.