This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Blend science and math to explore a very important first grade social studies question: does our planet contain more land or more water?

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

This science fair project will help students learn about non-vascular plants, such as mosses.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

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

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

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

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.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this project students experiment with making music using only glasses of water.

Use pepper and soap to discover some fun facts about the properties of water.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Teach your child about using pumps to move water in this simple and educational preschool science activity!

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

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

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

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.