Hi smile

I'm pretty sure it's an 'F' (I remember that part as being more 'major' than 'minor', of that makes sense), but on substituting the 'F' for an 'E', it is possible that I mis-remembered it.

It's an extremely distinctive melody. I'm sure it's how the song starts, but again, it may have come in after 20 or 30 secs.

A better way of describing the 'instrument' - it's like those little metal music boxes you'd get in Xmas crackers, place on something hollow and turn the handle.