In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

This classic children's game demonstrates how sound travels through air vs. through a solid.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This science fair project idea investigates whether air has mass and weight.

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.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Using a toy race car kids create a visual model of the Doppler Effect.

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.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

In this activity, your child will be challenged to make a tower using paper cups.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

This science fair project teaches students about wilting and browning of salad greens.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Test your friends to find out if you can replicate the placebo effect's incredible results.