He could play it faultlessly and with the greatest delicacy, and keeping exactly in time... At the age of five, he was already composing little pieces, which he played to his father who wrote them down.
Известен исторический анекдот, связанный с этим концертом: якобы, когда Вольфганг играл с детьми Марии Терезии, маленькими эрцгерцогинями, он поскользнулся на натёртом полу и упал.