Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

Ignite your kindergartener's love of adventure and learning with an imaginary trip under the sea.

Make a bear cave for your child to play and explore, learning about bears and winter hibernation.

Learn about Ikebana, or the Japanese art of flower arranging, with your child while artfully arranging spring flowers!

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.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

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

This classic children's game demonstrates how sound travels through air vs. through a solid.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

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

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

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

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

This science fair project idea examines whether boys and girls differ in reflexes.

Plants and light seem to be good buddies, but how far does the friendship really go?

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

Construct and experiment with a periscope using reflected light rays to gather an image.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Here's a simple craft activity that can help your youngster better visualize the life cycle of a frog as a circle.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.