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Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Test whether plants can grow without sunlight and water.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

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

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

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

This science fair project explores how osmotic pressure forces water through the root up into the plant.

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.

Learn all about balance and motion as your child designs a corn maze!

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

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

Discover whether a metal will expand under hot water.

In this experiment we will be determining whether birds prefer certain colors of seed.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

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

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

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