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

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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

Practice measurement using centimeters in this fun math race designed for your second grade student!

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

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

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.

If you love the idea of handing out holiday tins of homemade cookies but you're not a baker, chocolate-covered apples are the perfect solution.

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.

Countries all around the world have been using the abacus for thousands of years to make math easier. Have your kid make his own abacus to practice arithmetic.

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

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

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

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Here's a thought-provoking activity to make new vocabulary words "stick" in the mind of your young learner.

Here's a place mat your second grader can create, based on the classic frontier tradition of patchwork quilting.

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

In this activity, have your second grader practice measuring by finding the height, weight, and length of their most treasured toy!

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

Have your student draft a blueprint for a haunted house, and trick (or treat) them into learning about geometry in the process.

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

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

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

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 looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

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!

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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?