A three-movement symphony in the key of C, once thought to have been written by Franz Joseph Haydn, now more commonly attributed to Leopold Mozart (father of the famous Wolfgang Amadeus Mozart). Performed with the aid of toy instruments (e.g. rattle and cuckoo), it is also a "toy" symphony in the sense that it is a rather trivial instance of symphonic possibility.
Unfortunately, Leopold didn't foreshadow his son's genius; Wolfgang might have been able to make the instruments produce something other than cacophony. As it stands, it's reminiscent of bad bleep-blorpy electronica.
