Phosphorescent material absorbs sun light or artificial light and emit the light in the dark. The sands keep to glow for 5 hours with 30 minutes of absorbing light.
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Catamaran RC hovercraft knocks the socks off all the mono hovercrafts out there, we're all rather chuffed.The Lift fan is controlled by a button on the remote, so you can stop the lift in an instant, and therefore stop the craft with virtually no drift. It has a top speed of a mighty 15kmh, and naturally works on ...
This is the device that detects cloud-to-ground lightning strikes up to 75 miles away, providing an accurate, reliable warning before thunder is audible or storms are visible, allowing you to seek shelter long before the approach of storm cells.
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