Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Science fair project that examines the benefits of the plant enzyme: pectin methyl esterase (PME). Where is PME found in the plant? What does it do chemically?

Explore the belief in astrology as a predictive system.

Use an Elihu Thomson apparatus, also known as a ring launcher, to learn about electromagnetism concepts and the properties of various metals.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

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

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

Observe trends in the properties of writing materials over past 5000 years and extrapolate to future time. Prepare a table that compares writing material.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

Examine whether males or females are more likely to have a higher center of gravity.

The objective of this experiment is to evaluate whether funny advertisements are more or less effective than serious advertisements.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

This project makes young children uniquely aware of their sense of touch and its ability to alone give them information about the world around them.

Scavenger Hunt! Check out this fun science fair project idea to explore the difference between opaque, translucent, and transparent objects around your house.

This science fair project idea explores whether white light can be separated into different colors.

Science fair project that examines the physical features of elephants and butterflies and draws conclusions about their similarities.

This experiment explores whether music affects the growth of bacteria and could help figure out better ways to process sewage and other microbe-assisted duties.

Study history of aerodynamics of arrow design to create a perfect arrow. Test arrows by shooting at an archery target.