Magnetic Sand Timer
Set the device on its stand and watch the metal grains arrange themselves into a beautiful, spiked sculpture. What's the secret? A powerful rare earth magnet is hidden in the base. 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