Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

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

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

There are hundreds of properties in rocks which you can describe, so get your geology goggles on and get ready to rock your child's science skills.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Try hammering some plants with your kids to teach them a valuable lesson in flower science while making beautiful artwork in the process!

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This experiment that explores water and air pressure will amaze your fifth grader as it appears that a single card is holding water in an upside-down glass.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Learn with makes water molecules work with this fun and easy science activity!

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.