Bell and Sign
This thing appeared at the laundry pool, close to the place where Kafei could be found. If you strike this bell, Kafei will appear. As soon as he sees you, he will run back into the Curiosity Shop though.
This is a really small craft. Some people might like it somewhat bigger, so a good resize is appreciated.
Edit: Resized it a little bit, and changed some tabs. It will now be 12 CM high.