Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

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

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

Challenge your learner to design and build a city of their own in this creative engineering activity.

This project compares the strength of one, two, and three-ply toilet paper.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

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.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Discover how and which salt melts ice the quickest.

This science fair project idea identifies trees using a dichotomous key.

This project examines what types of objects burn and which burn faster and cleaner.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

Learn with makes water molecules work with this fun and easy science activity!

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Try hammering some plants with your kids to teach them a valuable lesson in flower science while making beautiful artwork in the process!

To help your child learn how to use a thermometer, try this temperature collecting activity at home.