Find out whether putting something on top of a plant will inhibit its growth.

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

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

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

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

Discover whether a metal will expand under hot water.

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 teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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

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.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

Find out whether a longer airplane will fly farther or a wider paper airplane.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.