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

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

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

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

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

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Who needs paint, glitter, or crayons when you have natural art supplies right outside your front door?

Create a brush pile to help wintering wildlife stay warm and cozy through the winter.

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

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Test whether plants can grow without sunlight and water.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

This science fair project teaches students the differences between fruits and vegetables.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

This science fair project idea investigates the difference in reaction times between boys and girls.