This hands-on activity that involves arranging pieces of yarn will teach your pre-K child the concept of ordering items by length in an interesting way.

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

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

Help your preschooler grasp the concept of ordering and sequence while teaching him valuable vocabulary with simple activities around the house.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

Strengthen your child's number recognition skills with this fun game using an old, empty egg carton!

Disguise a lesson focused on shape recognition as a Santa collage, and your pre-kindergartener won't even realize she's learning!

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Familiarize your preschooler with the concept of numbers one through five and counting with this hands-on activity.

Check out this interactive number line. It's a great way to strengthen your preschoolers understanding of basic numbers and the numerals that represent them.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

Thermometers are how we measure temperature, and we've all heard the terms "centigrade" and "Fahrenheit" tossed around, but what do they really mean?

Learn how to make a paper snowflake with these simple instructions. Help your child learn how to make a paper snowflake with only paper and scissors.

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

Your preschooler will not realize she's practicing her counting skills while playing with this interactive cereal abacus!

This science fair project idea determines which flower lasts the longest.

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?

Introduce the idea of measuring weight to your preschooler or kindergartener by making a fun and easy-to-use bungee scale to weigh household objects.

If your young child is a kinesthetic learner, this equation board is perfect for teaching him addition and subtraction facts.

Science fair project that tests how heat affects the chemical reaction between a seltzer tablet and a glass of water.

Your child will love making this adorable clover clock that will help him learn how to tell time.

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

This science fair project idea determines what factors influence an individual's reaction time using a web-based timed reaction test.

Build your child's vocabulary by exploring and discussing spatial relationships during everyday activities such as building, rearranging, and ordering.

This game provides your child with the opportunity to create, write, and read numbers.

With this fun craft activity, your child can design and "make" his own money, for use as currency and math practice at home.

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.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.