Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

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!

This science fair project idea determines which method of hand cleansing is the most effective.

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

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 project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This project determines what category of person is most likely to be ticklish.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Hatch a praying mantis egg case in a homemade habitat with your child's help! This is an amazing experiment in science and nature for kids of any age.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

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

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.