Kikkerland Happy Birthday Crank Music Box

Is there a button to start and stop the song? Or does the music just run until the crank stops?

how long does it play when fully wound? Thinking about using it in the classroom as a "timer" for off task talking so I need to know how long it plays

Does it come out of the box? Sounds silly, but making sure.

Re: make your own music box - 1261-a can we specify the 3 songs come with the kit?