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!

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

If it's Easter, it must be time for egg hunts. But we have to admit, most kids would rather take a bite out of a yummy cupcake than a hard-boiled egg.

Get your child excited about measuring with this fun and easy household measurements activity.

This measurement activity uses feet to compare objects, but not the ones found on rulers and measuring sticks...the feet on your child's own body!

Give your second grader a chance to get his feet wet with measurement before he moves onto the more complicated stuff by trying this activity with him at home.

This fun activity encourages your child to develop their skills in not only taking measurements, but also in working with the measurements themselves.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Encourage your child to compare and contrast a wide variety of autumn-themed items by weighing various objects and recording their findings.

Help your kids fall in love with nature by making a simple clay bird bath. Set it up in your yard and watch the animals venture in for a sip of water.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Make this easy recipe for Halloween, featuring white chocolate and pretzels, for a crispy, creepy treat!

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

How many steps long is the hallway? Kids put their graph-making skills to work as they make a step map of their own house.