Ferrofluid Desk Toy
We are constantly awash in a sea of waves, fields, and rays, not to mention whatever the aliens are shooting into us, and if the scientists didn’t tell us about it we would have no idea any of that stuff is even there. The ferrofluid desk toy is a super cool way to see what magnetic fields would look like if they were actually visible. The included 2-poled magnetic wand allows the user to literally manipulate physics with their hands. Well, that’s probably not true, but it kind of looks like it.