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

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

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

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

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

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

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

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

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

Making metric conversions is a difficult concept to master. Get in some extra practice by playing this Tic-Tac-Toe game with your learner.

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 create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

Turn any sunny summer day into a fun and special occasion by having a watermelon seed spitting contest!

How much does 100 weigh? Play this fun guessing game with your child to commemorate the 100th day of school.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

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

This science fair project idea identifies clouds as a means of predicting the weather.

This hands-on activity gives your child an opportunity to apply various strategies to solve a problem and to check if his answer makes sense.

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.

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.

Your child can turn cookie dough into a big pile of colorful painted fall leaves ready for eating!

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

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.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

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