Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

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

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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.

In this activity your child will create their very own marble maze!

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

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

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