Travelers, Marc Jacobs fans, boy do I have a deal for you! Recently in Boston, I popped into the Marc by Marc Jacobs store on Newbury Street and by the counter I found this adorable silver key chain. Designed similarly to the Tiffany’s Key Rings (where you unscrew the ball, to put your keys on the chain, then fasten it back on to hold them on the ring), it has a globe