Hitting the right note

After George had been plunking on the piano yesterday, he was carrying this note around. 

When I asked him what it was all about, he said, "I thought you'd have got it, dad.  It's like you see on pianos in those lagoons." 

I gave him a blank look, so he explained: "you know, with cowboys and all that." 

Ah. Saloons. 

It made me smile again today, when I saw he'd left it on the piano.