Got a kid who’s interested in how magnets work? Get them this magnetic field viewer, which uses iron filings suspended in clear silicone oil to offer a three-dimensional viewing of the magnetic lines of force. Shake the acrylic cube up, insert the included bar magnet through the tube in the middle, and watch as the filings align in a dipole pattern that would otherwise be invisible to the eye.

Looks a little something like this:

A post shared by physicsfun (@physicsfun) on May 5, 2018 at 10:16am PDT

It’s pretty neat and makes for a great educational gift or classroom toy. Way better than a boring old snowglobe, I’d say. Also includes a horseshoe magnet and a flat acryclic rectangle filled with iron filings and oil of its own.

Get this demonstrator set for $60 on Amazon.