The Crossroads of the Aether
Dusting off this discussion for a moment, here's an item that might have some possibilities along these lines.
A miniature spring loaded boxing glove. It's hilarious.
I was thinking of trying to get a pocket watch to transform into a bluetooth headset. Rig it so when you press the button that opens the face instead 1 of the sides would drop revealing the mic and a clip on the back would pop out to clip onto ones ear.