In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

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

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Make all-natural dye from vegetables to create gorgeous homemade play-silks!

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

You don't need to wait for rain to see a rainbow. Make one yourself, and teach your child about light and weather in the process.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

Test whether plants can grow without sunlight and water.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

This science fair project idea explores how length affects the weight a bridge can hold.

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

This science fair project examines how seeds hitchhike on animals and clothing.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

Help your child make a beautiful homemade sandcastle that will last!