Frankly, the idea of listening to tunes while we ride our bike terrifies us. How will we hear traffic noises or shouts of warning? What if our mp3 player falls, gets tangled in the spokes, and we somehow meet our end Isadora Duncan style? If you’re looking for pop while you pedal, consider the Tunebug Shake ($120). This little gizmo connects to your music player through a headphone jack or bluetooth, and then you strap it on your helmet. Through the magic of science, vibrations turn your helmet into a surround-sound speaker, allowing you to hear your Britney without blocking out road noise or having to deal with tangly cords.