Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Use simple materials to build a "worm hotel" with your kindergarten soil scientist...and see what worms really do all day.

This project explores ways to prevent static electrical shocks.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

Create a habitat for a butterfly right in your own backyard, and build your first grader's science knowledge while you're at it.

This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.

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

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

In this science fair project you will make a model of a cell membrane using very simple material.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This activity will introduce your child to the four different components of blood and give him a fun way to visualize its properties.

This craft is an excellent way to learn about African-American history, and it also provides fine motor practice.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.