Help your kindergartener learn to manage a telephone with this homemade keyboard that also helps kids practice letters and numbers.

The garden is the perfect place to practice math and science with preschoolers. Get digging (and counting, sorting, observing at the same time!)

Explore the math concept of probability with your fifth grader on "lucky" St. Patrick's day this year!

Fudge is one of very few desserts people make at home that is actually crystalline. What happens when the fudge crystallizes at different temperatures?

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

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

This project examines the concentration of dissolved oxygen in water, with and without oil.

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

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

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

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

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.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

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

Determine whether fresh vegetables have more calories or less calories than canned vegetables.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

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.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

The objective of this science project is to examine the factors that affect the dispersion of oil in water, including water agitation.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

The objective of this science experiment is to evaluate the affects of high and low heat capacity on a material's heat retention ability.