Teachers often struggle to hold their pupils' attention.
But Sara Shonfeld, the music teacher in this vid, has no such problems.
One of her young pupils, a little boy of about three or four, seems to think she’s great craic. Either that or he reckons her musical efforts are a bit of a joke.
Either way, we find it impossible not to laugh when we see him falling about the place laughing as Sara she strums her guitar.
Uploaded a couple of weeks ago, the clip has so far been viewed over 2.4 million times.