This holiday season, don't forget the many delights of "cookie science"! Here's a confection we especially like.

Make sourdough bread...and learn some colonial history and modern science in the process!

Help your fifth grader create an art card that celebrates the enduring values of Passover.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

This game will help build your child's word bank as she competes with family members for the "Word of the Day" champion title.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Plan a family dinner based on the "Little House" books, and encourage reading in the household!

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Construct batteries that make electricity from fruits with this fun science fair project.

Many kids find themselves especially challenged by writing in third grade. Here's how you can help, using a technique called "storyboarding."

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.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Check out this cool science fair project on identifying rocks and minerals for kids.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.