This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Looking for a project on machines? Get a fun elementary school science fair project idea to design a compound machine using your knowledge of simple machines.

Design and build an invention inspired by Rube Goldberg's designs. Build your invention. Test the machine, write a detailed report.

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.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!

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

This science project teaches students to classify different shapes of leaves.

This fun activity makes use of pasta shells, paint, and glue make a crab while your child learns about this unique creature.

Evaluate the efficacy of different pain management techniques.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

Investigate the advantages of the use of ceramics in engines such as the tiles used in Space Shuttle. Use iron filings and magnets.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

This project concerns activity happening millions of miles away, on the sun.

The objective of this science fair project it to determine whether adding ethanol alcohol to gasoline slows the run time of a motor.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Evaluate whether people can raise the temperature of their finger using the power of their thoughts.

This simple activity is not only fun, it's also a useful way to organize children's closets — and offer kids some autonomy to boot.