Well, seems the Apple peripherals could be very fun too. This Dexim Visible USB cable shows the electricity flowing into your device when you are charging them.  Featuring electroluminescent (EL) technology,it features lights that visibly show the electrical current flowing through the cable.

The nice thing that I like about it is the blinking animation on the cable gets slower as the battery of the device being charged nears its capacity, finally fading out when charging is complete. The Smart Charger intelligently shuts off power from the source, saving power and money. Cool huh?