This 12 oz container of iron filings is perfect for use to demonstrate magnetic fields. These ultra-fine iron filings are oil-free, so they won't stain and make for quick and easy cleanup. Some things that can be done with these iron filings is to mix them in with sand to make for an interesting experiment, or mix it into a combination of water and white glue to make a magnetic slime.<br><br>Visualizing magnetic fields is a fun and easy to do with any container and any magnet you may have on hand. See the magnetic fields that different shapes of magnets produce and so much more.