I've opened 9 platinum chests hoping for the race track, some found, some bought with extra gems.  So far, the most valuable item I have gotten was the corona sun dial.  That's 27 possible items to get, and I've only gotten magic, happiness, more magic, and 1 silly sun dial I already had 2 of!  Even getting a consolation concession stand would have been nice, but that's terrible results for that many chests.  I don't need happiness or magic!!!  They should really take those out of the platinum chests and keep them in gold or below.