Like the Rolly, it's hard to say exactly why having an RFID-enabled Nano:ztag in your life will make sleeping, eating and breathing each day any easier. In fact, the jury's still out on whether these things are simply novel or primed to take over where the Tamagotchi left off. Starting now, Violet is offering a rainbow's worth of its micro Rabbit devices here in the US, with prices ranging from $6.90 to $12.90 depending on color. Now, if only you could figure out how to integrate RFID into your life, you'd be set.Filed under: