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

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

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

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

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

Discover how and which salt melts ice the quickest.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.