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

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.

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 identifies clouds as a means of predicting the weather.

This science fair project idea deals with the qualities of shade on a sunny day.

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.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

This simple experiment serves as an introduction to the greenhouse effect.

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.

Do you think heat can affect a plant's growth rate?

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

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

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

The crust is fun for kids to mix and roll out, and the filling overflows with vitamin and anti-oxidant packed berries!

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.

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.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Time is an abstract concept that's difficult to grasp. But waiting for the turkey to come out of the oven on Thanksgiving is a concretely yummy experience.

How powerful is the reaction between baking soda and vinegar? Find out here!

This project tests the hypothesis that dark colors absorb more heat than light colors.

Practice conversions within the metric system in this fun math card game for third graders.

Any time is the perfect time to whip up a delicious batch of fluffy pumpkin cookies.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

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

Hiding protein-rich quinoa and a variety of fresh vegetables, these meatballs are the perfect answer to kid food woes.

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

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