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

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!

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

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

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

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

A simple science experiment exploring the physics of water pressure that's been amazing people since Medieval times.

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.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

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

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

How much water comes out of snow? Explore this timely question with your kindergarten scientist with this easy winter experiment.

Take advantage of the fact that ink and water don't mix and introduce your kid to suminagashi, a Japanese form of art.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.