In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

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

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.

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

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

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

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

Help your kindergarten science maven explore the water cycle without getting everything wet.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

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

Find out whether packaged seeds actually do expire in this new science fair project idea.

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

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

For a fun family activity to introduce your child to genetics, have your child go on a search for dominant and recessive family genes!

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Make sourdough bread...and learn some colonial history and modern science in the process!