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

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

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!

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

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.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

This science experiment tests if dog saliva can really help heal wounds.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

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.

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

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

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.

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