That sounds a bit like me last week, Toblerone, only it was the musical biscuit tins in M&S 
I have to admit, I wasn't overwhelmed by them. They had the tree shaped ones someone linked to earlier, but the music was more like recorded than what you would expect from a wind up tin iyswim. Then they had ones which you could record your own message, which weren't very pretty, really. And then rocking penguins which I might have to go back and buy!