Does nail polish really slow the growth of nails? Explore in this science fair project idea.

This experiment evaluates whether the phenomenon of "choice blindness" occurs more often with men or women.

In this project, you will observe and record changes in sunspots over two weeks.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

This interactive project invites science fair-goers to participate in examination and recording to demonstrate the importance of firsthand observation.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

In this experiment you will evaluate whether praise improves athletic performance.

This science fair project idea explores whether dry ice will cool a beverage faster than wet ice.

This science fair project challenges students to research vortices occurring in nature and then create their own vortex.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

This experiment researches if you gave different amounts of food to mosquito larvae would they grow faster or slower

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

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

In this cool psychology experiment, study how companies air commercials to strategically advertise to viewers who will buy their products.

Science fair project that determines whether mass and weight are the same or different.

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

How powerful is the reaction between baking soda and vinegar? Find out here!

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

Learn about the anatomy of the autonomic nervous system and its relationship to the rest of the body.

This experiment explores whether caffeine improves athletic performance.

This project uses toy cars to determine how friction and gravity affect cars and braking.

This science project has students study the idea of human beauty.