videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including 3 Year Old Drummer Making a New Rhythm (3/6/2011), 2 Year Old Drummer Discovering new sound (from 1/28/2010, 30 months old), 2 Year Old Travis Barker Wannabe Toddler Drummer (26 months old)