In this science fair project, young children discover what happens when two fluids that have different densities get together.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

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.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

This project examines whether people's taste perception is influenced by what they see.

People have favorite flavors, but what about ants? Which ant food is the most popular?

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

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

This science experiment has students test whether a snail moves faster on concrete or dirt.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

Learn how different types of soil affect how animal tracks form in this experiment!

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

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

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

In this project children practice the scientific method while playing with puffy paint.

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 project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!