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Here’s a handy way to keep a secret. Just grab one of these ultraviolet invisible ink pens, and you can leave yourself hidden messages that you can easily decode using the same pen you wrote them with.

Each pen has a built-in ultraviolet LED light, you can read messages that…

This alarm clock radio hides a dirty little secret beneath its innocent exterior. The clock has a tiny little wireless camera hidden in its face.

Available for about $64 from wholesale importer ChinaVasion, the Hidden Camera Spy Clock has a full color camera that transmits to a remote receiver for…