We all scream for ice cream

So there's an ice cream van going down the street, and the last few days, when J asks what it is, I say, "I don't know." Just now, in the bath, he heard it again, and D and I did the whole "it's just a van playing music, it's a music van." When I left the bathroom, he said to D "daddy, is it an ice-cream music van?" Oh well, no point hiding...