I dunno why this makes me smile so much.
Yes, it's probably pre-planned to some degree, but just look at the faces of the Secret Service. They don't look relaxed at all so I'm guessing this was unplanned. But think about it, tight space without a security check.
Well it is Canada after all, how dangerous can it be. ;-)
But it's so cool that he's actually buying stuff for his family and being so hands on.