Magnetic Sand Timer
What's the secret? A powerful rare earth magnet is hidden in the base. Set the device on its stand and watch the metal grains arrange into a beautiful, spiked sculpture. Each time you turn it over, a different pattern is formed as the ferrous material is drawn into the magnetic field.
Not intended as a real-time-keeping device; actual times will vary.
- Product Type: Science & Tinkering Kits