A dog, a cat, a fish--and a tiger.

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Listening to music takes on a whole new dimension when we bring our animated friends in on the fun. We're talking about those creatures from Tiger Electronics that move and groove along to our beat. We can't help but smile when we plug any of our music systems (iPod, MP3, or CD player, stereo, etc.) into the i-Dog ($29.99), and watch its ears perk up and head tilt.

With a twist of its tail, we can listen to our media player through the i-Dog's speaker--or headphones--while watching the dog's personality change depending on the type of music it hears. The LED light patterns and animations reflect the mood of the pet, and its temperament will change based on the amount of interaction it receives. The i-Dog also can listen to music through a...