Why play air guitar when so many objects laced with electronics let you hit realistic chords?
For less than $50, you can strum along with the pop hits on a Paper Jamz guitar, or one printed on the front of a T-shirt.
And for cyclists and students, the gadget seller ThinkGeek.com last week unveiled a fun way to play when you are away from the studio, presuming you have one.
The Electronic Guitar Bag (about $50) is a sturdy-looking canvas bike messenger bag with the image of an electric guitar topped with colorful flames on its flap. It also has a stylish mini-amp and speaker that you clip to the flap.

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