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.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

This biodiversity project examines the biodiversity in your own backyard.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

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

Determine if gender affects the ability to identify different smells.

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

Learn all about balance and motion as your child designs a corn maze!

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

This science fair project idea examines the reason boats are shaped and engineered.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

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

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

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!

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

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.

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

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

This science fair project idea explores whether white light can be separated into different colors.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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

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.