There are pin stations at every park and at Downtown Disney.
MK: Uptown Jewelers on Main St. and the Frontier Trading post
Epcot: Pin Central
MGM: Under the hat
AK: Island Mercantile
DTD: Pin Traders (far east side)
You can trade with any Cast Member that is wearing a Pin Lanyard; green lanyards are for guests 12 and under.
There are pin trading nights Thursday night at the All Star Sports Food Court and Friday night at the Contemporary.
There is pin trading every night outside Pin Traders at DTD.