Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

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

This science fair project idea explores which fruit molds the fastest.

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

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

Make a planter full of delicious seasonings and classic grilling vegetables, great for a Fatherâs Day gift or a fun start-of-summer outdoor activity.

In this activity, your kid will watch coal turn into crystals right before her very eyes, and learn some science along the way!

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Discover whether a metal will expand under hot water.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

This science fair project idea provides evidence that air is everywhere and takes up space.

This easy at-home experiment is a great way to "see" science.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

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

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

This project investigates the affect of storage temperature on microwave popcorn.

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.

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.