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!

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

This experiment that explores water and air pressure will amaze your fifth grader as it appears that a single card is holding water in an upside-down glass.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

Learn with makes water molecules work with this fun and easy science activity!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

Help your child understand surface tension by showing them how they can create a "skin" on top of 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 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.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

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.

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

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

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!

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

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.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.