What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

Find out whether packaged seeds actually do expire in this new science fair project idea.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

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

This science fair project idea explores the egg's thin membrane.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Discover how and which salt melts ice the quickest.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

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

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 plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This science fair project idea examines which type of insulation holds in the most heat.