With the Magnetic Sand Hourglass you can defy the laws of space, time, and physics and make it appear to flow in reverse. This unique hourglass puts a scientific spin on the sands of time. Flip the Magnetic Sand Hourglass over and watch the grains of iron stack up in seemingly impossible formations thanks to a magnet embedded in the wooden base. The Magnetic Sand Hourglass marks a minute and makes a great gift for gadget-loving people.