How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

Teach your child how butter is created by shaking up cream the old-fashioned way.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

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

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

This science fair project idea determines if the temperature of rubber effects how high it bounces.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

This science fair project idea explores the different properties of matter.

This science fair project idea explores the egg's thin membrane.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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

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

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

This science fair project idea determines what household items are good conductors of electricity.

Help your child learn about animal classification with this fun and delicious activity.

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

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!