I got a collection of music boxes as well :) Everyone with a diffrent melody :)
My favourite is the Ghibli musix box with the cats from Kiki's delivery service. I got it from my boyfriend at my twentysecond birthday.
The windmill is a souvenir i bought at my trip to Netherlands April 2009.
All my music boxes is about the same size, except for the windmill. I actually got another windmill which is even bigger but it's not in the photo.