Oh my goodness, a clown key! This looks like the funnest thing ever! Too bad no one has any idea what a clown key will do, because as of this writing (March 2016), this item has not yet been implemented.
How to Obtain
Not obtainable at this time.
How to Use
Who knows? Maybe a clown key will open a special tiny chest shaped like a car and dozens of clowns will pour out!