This science fair project idea produces varying pitches of sound.

Help your child construct and author a "sempuyo," a traditional Japanese book with accordion-style pages; she will develop her writing and fine motor skills.

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

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.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Here's a fun arts and crafts activity that has you and your child creating a book with a secret hollow!

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.