The Magnetic Hourglass
An hourglass of a special kind: The falling sand does not land on a hill, but forms amazing and puzzling structures.
How is this possible? The first secret: a small but strong neodymium magnet is embedded in the base of the Magnetic Hourglass. It obviously has an effect on the sand, and this leads to the second secret: there are no glass beads in the hourglass, but a fine cast iron granulate that can be attracted by the magnet.
Glass body with iron granulate
Running time approx. 24 seconds
Height with base: 16 cm
Base approx. 8 x 8 cm
Die Magnetische Sanduhr - Deutsch€19.80
€18.81
€17.82
€16.92